Mitsubishi Electric MELSEC FX-1HC User manual

USER'S GUIDE

JY992D53001A

FX-1HC

SPECIAL FUNCTION BLOCK

This manual contains text, diagrams and explanations which will guide the reader in the correct installation

and operation of the FX-1HC special function block and should be read and understood before attempting

to install or use the unit.

Further information can be found in the FX PROGRAMMING MANUAL and FX SERIES HARDWARE

MANUAL.

INTRODUCTION

●The FX-1HC hardware high-speed counter block is 2-phase 50 kHz high-speed counter. It is a special

function block for the FX, FX2C series PC. The FX-1HC counts at a higher speed than the built-in high-

speed counter of the PC (2-phase 2 kHz, 1-phase 10 kHz) and performs comparisons and outputs

directly.

●Various counter modes, such as 1-phase or 2-phase, 16-bit or 32-bit modes, can be selected using

commands from the PC. Allow the FX-1HC unit to run only after setting these mode parameters.

●The source of your input signal should be a 1 or 2 phase encoder. A 5V, 12V, or 24V power source can

be used. An initial value setting command input (PRESET) and a count prohibit command input (DISABLE)

are also available.

●The FX-1HC has two output. When the counter value coincides with an output compare value, the

appropriate output is set ON. A PNP and an NPN output transistor is provided for both outputs to allow

either sink or source connection methods.

●FX PCs versions 2.0 or later (those with serial number 13XXXX or larger) are required as these units have

the TO/FROM applied instructions in their instruction set. Data transfer between the FX-1HC and the FX PC

is by buffer memory exchange. There are 32 buffer memories (each of 16 bits) in the FX-1HC.

●The FX-1HC occupies 8 points of I/O on the FX or FX2C expansion bus. The 8 points can be allocated

from either inputs or outputs.

1.1 External dimensions weight : Approx 0.5 kg (1.1 lbs) Dimensions : mm (inches)

Accessories : Self-adhesive labels special block number identification.

5679

63 (2.48)

73 (2.87) 14

125 (4.92)

140 (5.51)

10 (0.39)

95 (3.74)

DISABLE terminal (M3.5 (0.14) screws)

YH•YS terminal (M3.5 (0.14) screws)

Extension cable and connector

POWER LED

φA,φB terminal (M3.5 (0.14) screws)

PRESET terminal (M3.5 (0.14) screws)

UP LED

φA LED

φB LED

DN (Down) LED

PRESET LED

Mounting hole 2- φ5.5 (0.22)

Attachment groove for 3.5 (1.38) wide DIN rail

DIN rail clip

DIS (DISABLE) LED

YH LED

YS LED

2Wiring

NPN output encoders can also be used.

Encoder

PhaseA

PhaseB

PhaseZ

OUT

COM

OUT

COM

OUT

COM

φA

φB

PRESET

DISABLE

START

+24V COM

Shielding wire

φA24

φA12

φA5

COMA

φB24

φB12

φB5

COMB

XP24

XP5

COMP

XD24

XD5

COMD

3.3k

1.5k

0.5k

0.1k

1.5k

0.5k

12 to 24V inputtable

12 to 24V

inputtable

DC24V+

YHP

YHN

DC24-

DC24V+

YSP

YSN

DC24-

〈〈

〈Using the solderless termination〉〉

〉〉

〉

●Use crimp terminals of the dimensions specified in the left figure.

●Secure the terminals using a tightening torque of 0.5 to 0.8 N•m (5

to 8 kg•cm).

●Wire only to the module terminals discussed in this manual. Leave

all thers vacant.

6.8 mm

(0.27 inches)

or less

6.8 mm

(0.27 inches)

or less

Class 3

grounding

(<100 Ω)

Extension

cable FX-1HC

+24V 0V

+24V0V

External power source

DC12 to 24V

*1. Do not connect YHP and

YHN, or YSP and YSN

together.

*2. Connect SG and the gro-

unded terminal at the PC

side as required.

External power source

DC5V, 12V, 24V

For

M3.5

(0.14

inches

)

NPN

Each output is set when the present value of the counter matches with the compare

value (which is transferred from the PC), and is switched OFF by a reset command

from the PC.

(Therefore, when the input frequency is 50 kHz, there is a worst case delay of 15 input

pulses.)

3SPECIFICATIONS

3.1 Environmental specifications

The environmental specifications for the FX-1HC are the same as those for your FX series PC.

3.2 Performance specifications

t2 t2

t1 t1

t3 t3

t1 : Rise/fall time is 3µs or less

t2 : ON/OFF pulse duration 10µs or more

t3 : Phase difference between phase A and phase B

is 3.5µs or more

PRESET (Z phase) input 100µs or more

DISABLE (count prohibit) input 100µs or more

Item

Input signal

Signal level

MAX. frequency

Pulse shape

Output

signal

Counting

specifi-

cation

Format

Range

Comparison Type

Output capacity

Automatic UP/DOWN (however, when on 1 phase 1 input mode, UP/DOWN is

determined by a PC command or an input terminal.)

When 32-bit is specified: -2,147,483,648 to +2,147,483,647

When 16-bit is specified: 0 to 65,535 (upper limit can be user specified)

DC 12V to 24V 0.5A

8 point taken from the FX, FX2C expansion bus (can be either inputs or outputs)

DC 5V 70mA

+Output

PNP Output

I/O occupation

Power from base

YHN

YHP

YSN

YSP

: NPN transistor output for YH output

: PNP transistor output for YH output

: NPN transistor output for YH output

: PNP transistor output for YH output

: Direct output processed by hardware.

: Software processed output with worst delay time of 300µs.

2-phase input 4 edge count2 edge count

25 kHz 12.5 kHz

1 edge count

50 kHz

5V, 12V, or 24V ±10% (selected by terminal connection) 7mA

1 input 2 inputs

1-phase input

Types of outputs –

Count modes

1-phase 2-input (add/subtract pulse)

3.3 Buffer memories (BFM)

(1) BFM #0 Counter mode (K0 to K11), BFM #1 DOWN/UP command

#5~#9, #16~19, #28, #31 are reserved.

1 edge count

2 edge count

4 edge count

32 bits

16 bits

K10

K11

The counter mode is selected form the PC. As

shown below, values between K0 and K11 are

written to buffer memory BFM #0 form the PC.

When a value is written to BFM #0 the contents

of BFM #1 to BFM #31 are reset to default values.

When setting this value use a TOP (pulsed)

instruction use M8002 (initial pulse) to drive the

TO instruction.

A continuous command is not allowed.

1-phase 1-input

32-bit counter modes

A 32-bit binary counter which executes UP/DOWN counting will change

from the lower limit to the upper limit or the upper limit to the lower limit

when overflow occurs. Both the upper and lower limits are fixed values:

the upper limit is +2,147,483,647, and the lower limit is -2,147,483,648.

16-bit counter modes

A 16-bit binary counter handles only positive values from 0 to 65,535.

Changes to zero from the upper limit or to the upper limit from zero when

overflow occurs; the upper limit is determined by BFMs #3 and #2.

Lower limit

-2,147,483,648

Ring length

(BFM #3, #2)

+2,147,483,647

Upper limit

Default: K0

Default: K65,536

Default: K0

Default: K32,767

Default: K0

Contents

Counter mode K0 to K11

DOWN/UP command (1-phase 1-input mode)

Ring length Upper/Lower

Command

Preset data Upper/Lower

YH compare value Upper/Lower

YS compare value Upper/Lower

Counter current value Upper/Lower

Maximum count value Upper/Lower

Minimum count value Upper/Lower

Compare results

Terminal status

Error status

Model identification code K4010

BFM number #0

#3, #2

#11, #10

#13, #12

#15, #14

#21, #20

#23, #22

#25, #24

#26

#27

#29

#30

Write / Read

Write

Read

2-phase input

(phase difference pulse)

Hardware

UP/DOWN

Software

UP/DOWN

(a)

(b)

1-phase 1-input counter (K8 to K11)

1-phase 2-input counter (K6, K7)

2-phase counter (K0 to K5)

+1 +1 -1

●Hardware UP/DOWN (K8, K9)

BFM #1

Phase B

K0 K1

OFF UP DOWN

Current

value

UP/DOWN is de-

termined by the

contents of BFM

#1, (K0/K1).

●2 edge-count counter (K2, K3)

Phase B input ON

→OFF while phase

A input ON Count

down by 1.

+1 +1 -1

Phase A

Phase B

●4 edge-count counter (K4, K5)

UP COUNT : DOWN COUNT :

●1 edge-count-counter (K0, K1)

(c)

(d)

Phase A

Phase B

OFF ON

OFF UP DOWN

Current

value

UP/DOWN is

determined by

input phase A

(ON/OFF).

●Software UP/DOWN (K10, K11)

Phase

B input

Phase

A input ON

OFF

OFF 1 2 3 3 3 2 1 0

Phase A input -1 at

OFF→ON.

Phase B input+1 at

OFF→ON.

If both phase A and phase B inputs are received

simultaneously, the counter value dose not

change.

(e)

Phase A

Phase B Phase B input ON

→OFF while phase

A input ON Count

down by 1.

Phase B inputOFF

→ON while phase

A input ON Count

up by 1.

Phase B input OFF

→ON while phase

A input ON Count

up by 1.

+1 +1 +1 +1

Phase A input

Phase B input

Phase A input

Phase B input

-1 -1 -1

-1

(2) BFM #3, #2 Ring length

When ring length K100 is specified, the value

of the counter changes as shown above.

DOWN

98 99 0 1

1 0 99 98

●When transferring counter data to/from this special function block, always use the 32-bit forms of

the FROM/TO instructions ((D) FROM, (D) TO).

●When you are writing a positive value between K32,768 and K65,535, the data should be treated

as a 32-bit value even when a 16-bit ring counter is used.

●Count data is always handled as a pair from two 16-bit values in this special function block. 16-bit

2's complement value stored in the registers of the PC cannot be used.

Write counter data with(D)TO

10.

Unless b1 is set to ON, YH (hardware compared

output) dose not turn ON.

Unless b2 is set to ON, YS (software compared

output) dose not turn ON.

When b3 = ON, YS output is reset if YH output is set,

and YH output is reset if YS output is set. When b3 =

OFF, YH and YS output act independently, and do

not reset each other.

When b4 = OFF, preset function by the PRESET

input terminal is disabled.

When b8 is set to ON, all error flags are reset.

When b9 is set to ON, YH output is reset.

When b10 is set to ON, YS output is reset.

When b11 is set to ON, YH output is set ON.

When b12 is set to ON, YS output is set ON.

Stores the data that specifies the length of the

16-bit counter (default: K65,536).

In the above example, K100 is written into BFMs

#3 and #2 of special block No.2 as a 32-bit binary

value (BFM #3 = 0, BFM #2 = 100). Permitted

values: K2 to K65,536.

K1(D) TO K2 K2 K100

X002

(3) BFM #4 Command When ‘1’ (ON)

Count permit

YH output permit

YS output permit

Mutual reset action

Preset permit

Error flag reset

YH output reset

YS output reset

YH output set

YS output set

BFM #4

b5 to b7

b10

b11

b12

When ‘0’ (OFF)

Count prohibit

YH output prohibit

YS output prohibit

YH/YS independent action

Preset prohibit

Undefined

No action

When b0 is set to ON and the DISABLE input terminal to

OFF, the counter is permitted to start counting input pulses.

(4) BFM #11, #10 Preset data

●Data to used as the initial value when the counter starts to count.

●Data becomes valid when b4 of BFM #4 is set to ON, and PRESET input terminal changes from OFF to

ON. The default value of the counter is zero. You can change it by writing a value into BFM #11 and #10

or by using the command below.

●The initial counter value can also be set by writing the data directly into BFM #21 and #20 (current value

of the counter).

(5) BFM #13, #12 Comparison value for YH output, BFM #15, #14 Comparison value for YS output

●After comparing the current value of the counter with

the value written in BFM #13 and #12, BFM #15 and

#14, the hardware and software comparator in the FX-

1HC outputs the comparison result.

●YH, YS output will not turn ON if you use PRESET or

the TO instruction to set the counter value equal to the

comparison value. It will turn ON only when a match

occurs by the counting of input pulses.

●The YS comparison operation takes about 300µs, and

if a match occurs, the output goes ON.

●Output occurs when the current value becomes equal

to the compare value but only if b1 and b2 of BFM #4

are ON. Once an output is set, it remains ON until it is

reset by b9 or b10 of BFM #4. If b3 of BFM #4 is ON,

however, one of the outputs is reset when the other is

set.

Current value Current value

BFM #4

b9, b10 BFM #4

b9, b10

Coincidence output Coincidence output

(6) Counter current value (BFM #21, 20)

The current value of the counter can be read by the PC. It will not be the correct value during high-speed

operations because of the communication delay. The current value of the counter can be forcibly changed

by writing a 32-bit value into the appropriate BFMs from the PC.

(7) Maximum count value (BFM #23, 22)

These store the maximum and minimum value reached by the counter. If the power is turned off, the

stored data is cleared.

(8) Comparison status (BFM #26) When ‘1’ (ON)

Set value >current value

Set value =current value

Set value <current value

BFM #26 is for reading only. Write commands from the programmable controller are ignored.

(9) Terminal status (BFM #27) BFM #27

b4 to b15

When ‘0’ (OFF)

YH output is OFF.

YS output is OFF.

When ‘1’ (ON)

YH output is ON.

YS output is ON.

Undefined

BFM #26

YH b0

When ‘0’ (OFF)

Set value ≤current value

Set value ≠current value

Set value ≥current value

When ‘1’ (ON)

Set value >current value

Set value =current value

Set value <current value

BFM #26

YS b3

When ‘0’ (OFF)

Set value ≤current value

Set value ≠current value

Set value ≥current value

BFM #27

When ‘0’ (OFF)

PRESET input is OFF.

DISABLE input is OFF.

When ‘1’ (ON)

PRESET input is ON.

DISABLE input is ON.

(10) BFM #29 Error status

Error status in the FX-1HC can be checked by reading the contents of b0 to b7 of BFM #29 to auxiliary

relays of the PC. Error status

Set when any of b1 to b7 is ON.

Set when the value of the ring length is written incorrectly (other than K2 to K65,536).

Set when the preset value is written incorrectly.

Set when the compare value is written incorrectly.

Set when the current value is written incorrectly.

Set when the counter overflows the upper limit.

Set when the counter overflows the lower limit. When the upper or lower limit is exceeded on a 32-

bit counter.

When value ≥ring length in 16-bit counter mode.

Set when the FROM/TO command is used incorrectly.

Undefined

There error flags can be reset by b8 of BFM #4.

(11) Model identification code number BFM #30

The identification number for a Special Function Block is read by using the FROM command.

The identification number for the FX-1HC unit is K4010.

By reading this identification number, the user may create built-in checking routines to check whether the

physical position of the FX-1HC matches to that of the software.

BFM #29

b8 ~ b15

5.2 Error checking

The following LEDs on the main panel of the FX-1HC may help you to troubleshoot the unit.

●φA, φB Goes on/off as φA, φB input turn ON/OFF. It can be checked by rotating the encoder slowly.

●UP, DN Lights up to indicate whether the counter is going up (UP) or down (DN).

●PRESET and DIS : The appropriate LED lights up when the PRESET terminal or the DISABLE terminal

is ON.

●YH, YS

The appropriate LED lights up when YH/YS output is turned on.

You can check the error status by reading the content of BFM #29 to the PC. Error contents are shown in

section 3.3 (10).

4EXAMPLE PROGRAM

5DAIGNOSTICS

Please use the following program as a guide whenever you use the FX-1HC unit. Other instructions to

read the current value of the counter, status etc. can be added as required.

M8002

Initial

pulse

K2 K0 K11 K1TO

X014

M8002

(D) TO

K12

K14

K1234

K1000

K900

K11 is written into BFM #0 of special function block

No.2. The counter input is 16-bit 1-phase. Please

use a pulse command for this initialization.

K1234→BFM #3, #2 (special function block No.2)

The ring length can be specified when a

16-bit counter is specified.

UP/DOWN direction should be specified for 1-

phase 1-input software determined UP/DOWN

counter.

K1000→BFM #13, #12 Set the compare value

for YH output.

K900 →BFM #15, #14 Set the compare value

for YS output (not necessary if only YH

output is used).

Note that counting only occurs if count prohibit is

OFF. Also, outputs will not be set from the counting

process at all if the relevant output prohibit are set

in the command register. Please reset the error

flags and YH/YS output before you start. The

mutual reset and preset initialization commands

can be used as required.

(M25 to M10) →BFM #4 (b15 to b0) command7.

K4M10

K20

M8000

RUN

monitor 8. BFM (#21, #20)→Reads the current value to the

data registers D3 and D2.

M18

M19andM20

M10

M11

M14

PLS

(D)FROM

M13

Count allowed

Output allowed

Mutual reset

Preset allowed

Error flag reset

YH YS output reset

5.1 Preliminary checks

(1) Check that the I/O wiring and extension cable of the FX-1HC are properly connected.

(2) 5V 70mA power is supplied from the base or extension units for the FX-1HC. Check that there is no

power overload from this and other extension blocks.

(3) The counter works correctly only when data such as the counter mode (set with a pulse command), the

TO command, the compare value, etc. are appropriately specified. Remember to initialize the count

(BFM #4 b0), preset (BFM #4 b4), and output (BFM #4 b2, b1) prohibits. Reset the YH/YS outputs

before you start.

X010

M8000

X011

X012

X013

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