Spectrum Controls 140 EHC 204 00sc - Manual (Page 11)

Quantum Series 140 EHC 204 00sc 140 EHC 208 00sc
12
Hardware Description
Door (removable) Covers the terminal block and includes an identification label for terminals.
Door label Permits easy terminal identification.
LED indicators Display operating and fault status of module.
Details are provided in “
Diagnostic LEDs ”.
Side label (nameplate) Provides module identification.
Self-locking tabs Secure module in rack slot.
Terminal block Used for field wiring the module.
Diagnostic LEDs
The module supports the LEDs listed in table 1-1 . These LEDs help you identify the source of problems that
can occur during power-up or during normal operation. Power-up and operation diagnostics are explained in
chapter 5, “Maintenance and Diagnostics.”
Table 1-1 Module LEDs
LED Name Color State State Description
Ready (Module Status) Green On Module powered up and functioning normally.
Off Module is not powered up.
Active Green On Bus communication is established between module and PLC.
Off No bus communication.
Fault Red On Module self-test error or fatal hardware error. LED blinks to
indicate type of self-test error.
Blinking Type of self-test error. Count the number of blinks before a
pause to determine the error code. Possible codes are listed in
the table below.
Channel Status (8 LEDs) Green On Channel is enabled and a valid input signal is present. The
LED indicates the state of the counter enable bit. It does not
indicate the state of an external hardware gate. See description
of the counter enable bit in chapter 3, “Module Configuration.”
Table 1-2 Channel LEDs
Code (Number of Blinks) Error Type
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.