SIGMA SYSTEMS CC-3.5 Owner's manual

CC-3 Manual

SIGMA SYSTEMS

MODEL CC-3.5

PROGRAMMABLE TEMPERATURE CONTROLLER / INTERFACE

INTERIM RELEASE SUPPLEMENT

OPERATING & PROGRAMMING MANUAL

Firmware Release 7.0.0

July 18, 1997

SIGMA SYSTEMS CORPORATION

3163 Adams Avenue

San Diego, California 92116 USA

TEL: (619) 283-3193 WWW.SigmaSystems.Com FAX: (619/283-6526)

CC-3 Manual

Sigma Systems Corporation

3163 Adams Avenue

San Diego, California 92116 USA

The manual may be reproduced, in whole, or in part, solely for the purposes of use

and training for the use, of Sigma Systems equipment, or as required to assist in the

sale of new Sigma Systems equipment. No modification of the content is permitted.

CC-3 Manual

TABLE OF CONTENTS

A Model CC-3 Interim Release Upgrade Information ......................S1

A.1 Compatibility with CC-3 and CC-3 Final Release products .........S1

A.2 Final Release Additions .....................................S2

B Hardware & General Revisions .....................................S3

B.1 Firmware downloads .......................................S3

B.2 Release number at startup ..................................S3

B.3 Temp range at startup ......................................S4

B.4 Fahrenheit Operation .......................................S4

B.5 probe out of range shutdown .................................S5

B.6 Internal Error Shutdown Conditions ............................S6

B.6.1 Watchdog Timer ....................................S6

B.6.2 Memory signature checking ...........................S7

B.6.3 Setup parameter integrity checking .....................S7

B.7 Temperature slope/offset adjustment ...........................S7

C Program Mode Revisions ..........................................S9

C.1 Insert/Delete step .........................................S9

C.2 Any step can point to step 100 ..............................S10

C.3 Safer program clear .......................................S10

D Remote Mode Revisions ..........................................S11

D.1 RS232 baud rates 19,200 38,400 ...........................S11

D.2 RS232 bus initialized upon setting to remote ...................S11

D.3 Fault tolerant parser ......................................S11

D.4 QS Query Setpoint Command ...............................S11

D.5 QV Query Version Command ...............................S12

D.6 QU Quit Command .......................................S12

E Setup Mode Revisions ............................................S13

E.1 Fahrenheit and Celsius Modes ..............................S13

E.2 Temperature Correction Entries .............................S13

Final Release Update Instructions .....................................S14

CC-3 Manual

A Model CC-3 Interim Release Upgrade Information

TheSigma Systems Model CC-3 Controller you have received was shipped with

Interim Release, version 7.0.0, firmware. One of the features of the CC-3 is it’s

ability to receive firmware updates via the serial port. Please take the time now to

complete the form at the end of this Interim Release Software section and mail to

Sigma in the enclosed envelope. When the final release firmware is available, we

will use the contact information you supply on this form to contact you. You will

receive the upgrade firmware and a new manual free of charge. Upgrade firmware

will be available to you either as a plug in EPROM chip, or on diskette for serial port

installation from a PC.

The decision to ship the CC-3 with interim release firmware was a made to allow

you to take advantage of the new speed, stability and some of the new features of the

CC-3 earlier than would have been possible if shipment had been delayed until the

final release firmware was available.

A.1 Compatibility with CC-3 and CC-3 Final Release products

The interim release firmware is fully backward compatible with release 5.3 firmware

that has been shipping in Model CC-3 controllers since mid 1994. You should be able

to place a CC-3 in a production environment that has been using model CC-3

controllerswithout incident. However, if you choose to use any of the CC-3 new

features in your remote control programs, existing CC-3 controllers will not respond.

Likewise, the CC-3 fault tolerant parser will correct many small errors in the data

stream that the CC-3 will not tolerate.

The final release of the CC-3 firmware will be a superset of the interim release

firmware with one important exception. The temperature correction feature of the

interim release firmware is implemented through setup entries on a global level such

that the correction is applied after the temperature is read from the each probe into

the control routines. There is therefor only one correction factor, which affects each

probe the same. The final release software will implement temperature correction

at the probe level. There will be two temperature corrections available... one for each

probe. The setup parameters will be numbered differently and it will be possible to

set the correction factors over the bus at run time.

This interim manual was written for use with, and as an addition to, the Release 5.3

manual for the model CC-3 Sigma controller.

CC-3 Manual

A.2 Final Release Additions

The following features, not in the interim release, will be in the final firmware:

Probe level temperature correction

Remote control temperature correction

Average probe temperature control

Direct access to setup parameters

Remote control command queue placement acknowledgment

Remote control command start acknowledgment

Remote control command completion acknowledgment

Nested control loops

User reinitialization of setup parameters to default values

CC-3 Manual

B Hardware & General Revisions

The new CC-3 introduces a number of new improvements to make the controller

faster and more reliable than its predecessor.

TheCC-3 has a completely new digital processing board. The new board has a

much faster processor, more memory, and a much faster IEEE-488 GPIB controller.

Interrupts have been completely restructured to improve stability. The multilayer

design is far more tolerant of both static and power line interference. There is now

a watchdog timer to detect system lockups in the event that something does interfere

with the system. The command stacking and acknowledging that will be included

in the final firmware release, along with the watchdog timer, will allow virtually

seamless recovery from system interruptions, regardless of their source.

The new firmware also monitors the state and integrity of internal memory. Critical

system information is stored in multiple places so that minor errors due to

uncontrollable transients or other causes can be repaired on the fly with no

disruption in process control.

System integrity is further enhanced by a series of successive shutdown processes

that monitor the integrity of the data coming from the sensor probes. In the event

that any probe reports a temperature more than 20°C beyond the limits of the

controller, the controller will shut down all heating and cooling and display a

warning message. Likewise, in the event that a sensor probe reports an extreme

temperature, either hot or cold, the system will assume that a probe has become

compromised and stop applying heat and cooling.

B.1 Firmware downloads

When the final release firmware is sent to you, you can easily download it into the

CC-3 .The procedure requires only a diskette bootable PC and a serial cable and

takes only a couple of minutes. Instructions will be included with the updated

firmware.

B.2 Release number at startup

Upon power up of the controller, the front panel will display c3-5for one second

and will then change to show the current firmware release version in the form of

rEL 7.0.0

CC-3 Manual

B.3 Temp range at startup

Each CC-3 controller is set at the factory for use with a specific device (chamber or

platform). Because the controlled device was made to specific thermal limit

specifications, the controller to be used with each device is set to operate only within

the range of the controlled device. The setting of an operating range involves a

number of internal adjustments and calibrations and the loading of specific control

tables for that range. This setting can only be changed by Sigma Systems service

personnel. We recommend that each controller be kept with the device for which it

was originally configured.

However, if you find that it is necessary to move a controller to another device, it is

important that you check to be sure that the controller that is moved is configured

to operate in the appropriate range for the device it is to control. As of March, 1997,

controllers are supplied for three ranges as follows:

-100 °C to 200°C

-100 °C to 300°C

-100 °C to 350°C

To check the internal range setting of your CC-3 controller, turn the mode switch

from OFF to any other position. During the five seconds that the firmware release

number is shown on the display, press <DISP/TEMP>. The internal range setting will

be displayed for 5 seconds following the version display.

B.4 Fahrenheit Operation

The CC-3 can use either Celsius or Fahrenheit temperature scales. Celsius is the

defaultmode. When the controller is operating in Celsius mode it’s behavior is

identicalto the model CC-3 controller. When the controller is operating in

Fahrenheitmode, both the displays and the bus communications are different.

These differences are intentional and designed to prevent errors that might arise

from a user using setpoints in one scale while the controller is operating in the other

scale. Note, however, that there is no difference in the Program mode programming

operation of the CC-3 when operating in either Fahrenheit or Celsius mode. It is

incumbent upon the user to notice the differences in the temperature displays and

program accordingly.

To change the temperature scale, use SETUP mode (see Section 6 in CC-3 Manual)

to access setup field 16. Select either of these field values:

0 Celsius

1 Fahrenheit

CC-3 Manual

When in Fahrenheit mode, temperature displays have an “F” following the probe

identifier on the left side of the display. Example:

p1f 102.4

Likewise, temperature inquires over the bus (PT command - see Section 5.1.15 in CC-

3 Manual) will return a string with an “F” as the third byte in the string. The string

will therefore be 1 byte longer than the string returned in Celsius mode. This

difference was intentional as it requires a modification of the parsing routine that

will assure that Celsius and Fahrenheit data are recognized properly. Thus, if the

currentprobe 1 temperature is 86.7°F, the result of a Fahrenheit mode get

temperature query for probe 1 (query command = PT1) would be S1F 86.7<CR><LF>.

If the temperature at probe 1 was 55.4°C, the same command in Celsius mode would

return S1 55.4<CR><LF>

For Remote mode operation over the bus, the CC-3 may be queried to determine the

current temperature scale by using the QS, Query Setpoint, command. See Section

D.4.

B.5 probe out of range shutdown

The CC-3 controller frequently checks to be certain that the control temperature, as

reportedby the active control probe, is within the normal operating limits of the

controller. In the event that the temperature reported by the active control probe is

more than 20°C, and less than 50°C, outside the controller’s operating range, then

the controller will presume that an error condition exists that is severe enough to

warrant a system stop. The controller display will show

p1 lo p1 hi

“LO” indicates that the reported temperature was 20-50°C below the operating range

of the controller. “HI” indicates that the reported temperature was 20-50°C above the

operating range of the controller.

In the event that the control temperature reported by the active control probe is more

than 50°C beyond the operating range of the controller, the system will be stopped

and the display will show

p1 err p1 -err

CC-3 Manual

The minus sign in the display indicates that the reported temperature was below the

operating range of the controller and the absence of the minus sign indicates that it

was above the operating range.

Note that because the CC-3 will report a HI or LO condition and stop controlling for

an error of 20-50°C, the only events that will typically trigger an Err or -Err

condition is a failure of the sensing circuit, most likely an open circuit (Err) or short

(-Err).

Note also that any adjustments to the probe readings made by adjustment of the

control temperature slope and offset corrections (See Section B.7) will not affect

system over/undertemp shutdown operations. The raw probe readings for the current

active control probe are used for the system health monitoring.

B.6 Internal Error Shutdown Conditions

The CC-3 monitors system health by keeping track of three additional areas; they

are:

Processor health Tracked by watchdog timer

Memory condition Checked at startup

Setup parameter integrity Checked continuously

B.6.1 Watchdog Timer

Should the system become locked due to corruption that causes the processor to

continuously malfunction, an independent watchdog timer will cause a full system

reset. After a watchdog reset, the display will show

res err

If the controller was operating in Local or Program mode, the mode switch must be

turned to the OFF position, then back to the desired mode to clear the reset message

and continue operation. Internal memory will be the same as it was when the

shutdown condition occurred. If the controller was in Remote mode, operation may

only be continued after the controller is sent a Device Clear (GPIB), or Quit (RS-232).

CC-3 Manual

B.6.2 Memory signature checking

Each time the CC-3 is powered up, the system checks a series of memory signature

bytes to test the integrity of system memory. If the signature bytes are not correct,

the system assumes that memory has been compromised. If this should occur (a

normal event any time a memory chip is replaced) all of system memory is

reinitialized. All program steps for Program mode are reset to their default values,

and all setup parameters are reset to their default values. The display will show

all clr

The mode switch must be subsequently turned to the SETUP position to clear the

display and resume normal operations. Be sure you remember to restore any setup

parameters that have been changed by the system reset.

B.6.3 Setup parameter integrity checking

Each time the system must rely on a system setup parameter the condition of the

setup parameter memory is checked against a replica that the system stores in

memory. If there is any difference between the two copies of the parameter memory,

the system will try to determine which table is correct and restore the incorrect copy.

If restoration is not possible, the system will shutdown, reinitialize the setup

parameters to their defaults, and display

su err

The mode switch must be subsequently turned to the SETUP position to clear the

display and resume normal operations. Be sure you remember to restore any setup

parameters that have been changed by the system reset

B.7 Temperature slope/offset adjustment

The CC-3 will allow you to enter data via the Setup mode that will correct any

anomalies in the temperature readings and control. Such adjustments are sometimes

necessary to optimize accuracy at a particular temperature, or to compensate for

differences between raw probe temperature data and actual temperatures. These

differences can be the result of probe placement, effects of the unit under test on the

temperature data, or other causes.

Temperature adjust is achieved by entering four temperatures into setup parameters

U1, C1, U2, & C2. U1 & U2 are the uncorrected, or displayed, temperatures at two

Table of contents

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