Micromod Micro-DCI: 53MC5000 Multi-Loop Process Controller Instruction Manual - Manual (Page 321)

AI4-7, AO2, and AO3 optional inputs and outputs are configured on the controller expansion board
with the Multichannel Analog Option card. The calibration constants for these inputs and outputs
reside in the board memory and not the controller memory. Consult MicroMod for the option
card calibration procedures.
AI8 is configured on the controller expansion board with the Single Channel Analog Input Option
card or the Multichannel Analog Option card. The isolation modules available for these two cards are
factory calibrated and have no adjustments. However, the analog/digital converter on the option
cards digitizes the 0 to 5 volt signal from the module and can be recalibrated. Consult
MicroMod Automation for the calibration procedures for these option cards.
18.5 ERROR AND HARDWARE MALFUNCTION MESSAGES
•
Logo - The controller is in FIX 0 because B00 was inadvertently set to 0 by an
F-TRAN program instruction or due to Main PCB malfunction.
•
NO DISPLAY - The Display Index, B05, is set to 0. This can be caused by setting B05 to
run a non-existent display which forces a 0 for the display code.
•
Entire Display Flashes - The watchdog timer has timed out. A watchdog timer failure indi-
cates analog outputs where not updated within a safety time limit due to a probable Main
PCB failure. The AOs are shorted to ground and the DOs are opened. The watchdog latch
(WD) is illustrated in the AO and DO schematic drawings of Section 5.
•
CPU RAM FAILURE - IC U1 failure (the Main PCB is marked to identify the location of U1).
•
ROM CHKS FAILURE - IC U3 failure (the Main PCB is marked to identify the location of U3).
•
CTRL FTR FAILURE - Control F-TRAN program had a Polish Stack error.
•
BACK FTR FAILURE - Background F-TRAN program had a Polish Stack error.
•
DSPL FTR FAILURE - Display F-TRAN program had a Polish Stack error.
18.6 RESETTING THE CONTROLLER
The controller can be reset either by cycling the power, or by carefully pressing the reset button with
a thin wire, such as a paper clip, inserted through the small reset hole in the upper left corner of the
front bezel. When the controller resets, it immediately checks to determine if any of the horizontal
keypad push buttons are held pressed. It enters the factory test mode, defaults the database, or
enters the suspend control state depending on which push button is held pressed during the reset.
This eliminates the necessity to initiate these operations by entering values into datapoints in
engineer mode.
•
If the F1 push button is held pressed during controller reset, the controllers enters a factory
test mode. WARNING: REMOVE ALL CONNECTIONS FROM THE FACEPLATE MINI-
DIN PORT BEFORE ENTERING TEST MODE. The test mode can be exited by resetting
the controller again using the paper clip with no push buttons pressed.
•
If the F2 push button is held pressed during controller reset, the controller database is set to
the defaulted values. The defaulted values are listed in Section 5 and Appendix D. These
values will replace the existing values in the datapoints that were entered to configure the
control strategy. To default the database, perform the following steps:
Section 18. Maintenance and Parts List
18-12