Checking auxiliary inputs

Introduction

The 24 V voltage on the auxiliary I/O connector is monitored. A fault occurs if the voltage is less than 19V.

Consequences of the power supply fault

If the 24V power supply is too low (<19V):

Position reading is no longer performed: data item Ang_Ok = 0
The cam processor is set to STOP. data item Pcam_on = 0

Auxiliary input power supply fault

Signalling:

The ERR (red) LED is off
The RUN (green) LED is lit
The CH0 (green) LED flashes
The I/O (red) LED is on

The bit %Ir.m.MOD.ERR = 1. The READ_STS instruction applied to the module is used to refresh the status, and you will find:

FAULTY_CH =1

The bit %Ir.m.0.ERR = 1. The READ_STS instruction applied to channel 0 is used to refresh the status, and you will find:

Aux_FLT = 1 and
Aux_Supply = 1 if the encoder is incorrectly supplied

If auxiliary input power supply fault masking has been configured (Supply_Aux_MSK) then: %IWr.m.MOD.ERR, %IWr.m.0.ERR and Aux_Flt will not be set to 1 on an encoder power supply fault.