Spectrum Controls 140 MPM 204 00sc - Manual (Page 53)

Meter Proving Module
55
Internal Diagnostics Internal Diagnostics Internal Diagnostics Internal Diagnostics Internal Diagnostics
The module performs internal diagnostics at both the module and channel levels of operation. When
detected, module error conditions are immediately indicated by the ready (module status) LED. Channel
errors are reported at their respective LEDs.
The module reports error conditions to the PLC. Channel error conditions are reported in the module’s input
data table. Module hardware errors are typically reported in the PLC I/O status file. Refer to your controller
manual for details.
When a fault condition is detected, the PLC sets analog outputs to zero. The data in the output data file is
retained during the fault. Once the fault condition is corrected and the major fault bit in the controller is
cleared, the retained data is sent.
Fault LED:
Number of Blinks:
Fault:
Off No Faults
1 Dual Port RAM fault.
2 FPGA init fault.
3 FPGA1 program fault.
4 FPGA2 program fault.
5 FPGA1 fault.
6 FPGA2 Fault.
7 Watchdog Fault.
8 ROM CRC fault.
9 EEPROM fault.
10 Both Speed mode and Autosequence mode selected (Mutually exclusive
Power-Up Diagnostics Power-Up Diagnostics Power-Up Diagnostics Power-Up Diagnostics Power-Up Diagnostics
At module power-up, a series of internal diagnostic tests is performed. These diagnostic tests must be
successfully completed for the ready (module status) LED to be illuminated. If the tests are not successful,
the ready LED remains off and a module error results and is reported to the PLC.
Channel Diagnostics Channel Diagnostics Channel Diagnostics Channel Diagnostics Channel Diagnostics
When an input channel is enabled, the module performs a diagnostic check to see that the channel has been
properly configured. In addition, the channel is tested on every scan for configuration errors, hardware errors,
and roll-over/under conditions.
If a channel configuration word is improperly defined, the module disables the channel.Common reasons for
configuration errors are:
On Solid No Faults
1
Frequency Limit Out of Range
2 Counter Limit Out of Range.
3 Counter Preset Out of Range.
4 Channel Pair Gate Enable Configuration Mismatch.
5 Quadrature Pair Configuration Mismatch.
6 Both Stop on 0 and Stop on Limit selected (Mutually exclusive).
7 Both Roll Over to Preset and Roll Under to Preset (Mutually exclusive).
8 Unrecognized parameter type.