Spectrum Controls 140 EHC 204 00sc - Manual (Page 62)

Counter / Flow Meter Input Module
63
Health Status Test (Concept)
1. In Concept, access the I/O configurator and ensure that the module description, slot location, and
register assignments are correct.
2. Use the controller status to verify that the module is recognized and reported as healthy. If you find an
asterisk in front of the module name, the rack does not recognize the module. To correct the problem,
see troubleshooting.
Register Operation Test
1. Check the count rate in the input register for a signal indication. If status bit 14 (counter input state) is
set to 0 and status bit 4 (zero rate) is set to 1, no signal is indicated. See “ No Signal Indication ”.
2. It is a good idea to ensure that the 4X register and the 3X+3 Status word are set up properly. As a quick
check, disable all ladder programming and set the 4X register to 0000 hex.
Troubleshooting
Ready LED Does Not Illuminate
Possible Causes
The most probable reasons for the LED not illuminating are:
•
The PLC system is not receiving power from its power supply.
•
The module is located in a defective PLC rack slot.
•
The module is defective.
Corrective Action
1. Make sure that the PLC is receiving power.
2. Reinstall the module in the rack according to instructions in chapter 2, “Installation and Wiring.”
3. If the ready LED still does not illuminate, try it in another PLC rack slot.
4. If you are still unable to start the module, call your local distributor.