Rockwell Automation 61C350 2-In/2-Out 0-10 Volt Analog Rail Module - Manual (Page 37)

5Ć3
DANGER
VOLTAGE IS PRESENT ON THE PLUG CONNECTOR TERMINALS. DISCONNECT
THE POWER AT THE SOURCE BEFORE TOUCHING THE PLUG CONNECTOR
TERMINALS. FAILURE TO OBSERVE THIS PRECAUTION COULD RESULT IN
SEVERE BODILY INJURY OR LOSS OF LIFE.
DANGER
DO NOT TOUCH THE CONNECTORS ON THE FACEPLATE IF THERE IS POWER
ON THE WIRES ATTACHED TO THE PLUG CONNECTOR SCREW TERMINALS.
ALWAYS TURN OFF POWER BEFORE HANDLING A CONNECTOR THAT IS
WIRED. FAILURE TO OBSERVE THIS PRECAUTION COULD RESULT IN SEVERE
BODILY INJURY OR LOSS OF LIFE.
Step 2. Verify that the connections on both ends of the I/O Rail
cable are tight. Check that the input connector pins are
not bent.
Step 3. Turn on power to the module. The COM OK" LED should
be illuminated if communication is taking place. If the LED
still does not illuminate, turn off power to the module and
replace the I/O Rail cable.
Step 4. If applicable, try to reset the condition by disconnecting
and then reĆconnecting the cable between the host and
the Local I/O Head, the AutoMate Remote I/O Head, or
the
DCS 5000/AutoMax Remote I/O Head. Troubleshoot the
host if necessary. If the problem is still not corrected,
replace the Analog Rail module.
5.3 Incorrect Data
Problem: The data (signal) being read or written is always on,
always off, or different than expected. The possible causes of this
problem are incorrect configuration, a programming error, a
disconnected or malfunctioning I/O Rail cable, disconnected or
malfunctioning wiring to the external hardware, malfunctioning
external hardware or a malfunctioning Analog Rail module. After
verifying that the configuration of the module is correct, follow the
steps below to isolate the problem.
Step 1.
Verify that the application program(s) is correct. Check to
see that the program is referencing the correct registers
(AutoMate) or symbolicnames (DCS 5000/AutoMax). In
DCS 5000/AutoMax applications, make certain that the
program is not attempting to write to the input channels.
Verify that the data being output is within the specified
limits.
Step 2. Stop any application tasks that are running. Turn off
power to the Analog Rail module.