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Chapter 7
Testing Module Operation
7–2
cable shields are properly grounded
d.
ATTENTION: Do not attempt to ground the cable at the
module's terminal block. It does not connect to earth ground.
Ground the cable at one end only, as described in chapter 2.
e.
the module's terminal block is securely connected
f.
you installed the module in its addressed I/O rack slot
2. Disconnect Analog Process Control Devices
During the following test procedures, the you will operate the processor in
Run mode. As a safety precaution, make sure that analog process control
devices are inoperative. These devices include:
proportional valves
proportional drives
servo amplifiers
other analog signal amplifiers that drive analog output devices
Where possible, leave the module connected to the output device to serve
as the output load, but inhibit its affect on controlling the process. As an
alternative, substitute a passive load for the active device.
ATTENTION: Process operation during system checkout can
be hazardous to personnel. During checkout procedures,
disconnect, inhibit, or substitute a passive load for all devices
which, when energized, might cause the process to operate.
3. Power Up the I/O Rack
Apply power to the fixed or modular system. The module's LED should be
illuminated (red), indicating that the module is receiving power.
If not, troubleshoot the non–illuminated LED. Check the following
The SLC 500 system is not receiving power from its power supply.
For an SLC processor in the fixed system, check the processor's
POWER LED. For the modular system, check the power supply LED.
If the LED is not illuminated, refer to the Installation & Operation
Manual or the system.
System power is not being received by the remainder of the SLC 500
system. Test this by attempting to go online with the programming
device.
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