Publication 1769-UM005A-EN-P
5-2
Diagnostics and Troubleshooting
Stand Clear of the Equipment
When troubleshooting any system problem, have all personnel remain
clear of the equipment. The problem could be intermittent, and sudden
unexpected machine motion could occur. Have someone ready to operate
an emergency stop switch in case it becomes necessary to shut off power.
Program Alteration
There are several possible causes of alteration to the user program,
including extreme environmental conditions, Electromagnetic Interference
(EMI), improper grounding, improper wiring connections, and
unauthorized tampering. If you suspect a program has been altered,
check it against a previously saved master program.
Safety Circuits
Circuits installed on the machine for safety reasons, like over-travel limit
switches, stop push buttons, and interlocks, should always be hard-wired
to the master control relay. These devices must be wired in series so that
when any one device opens, the master control relay is de-energized,
thereby removing power to the machine. Never alter these circuits to
defeat their function. Serious injury or machine damage could result.
Module Operation vs.
Channel Operation
The module performs diagnostic operations at both the module level and
the channel level. Module-level operations include functions such as
power-up, configuration, and communication with a 1769 bus master,
such as a MicroLogix 1500 controller, 1769-ADN DeviceNet Adapter or
CompactLogix controller.
Channel-level operations describe channel related functions, such as data
conversion and over- or under-range detection.
Internal diagnostics are performed at both levels of operation. When
detected, module error conditions are immediately indicated by the
module status LED. Both module hardware and channel configuration
error conditions are reported to the controller. Channel over-range or
under-range conditions are reported in the module’s input data table.
Module hardware errors are typically reported in the controller’s I/O
status file. Refer to your controller manual for details.
Содержание Compact 1769-IR6
Страница 1: ...Compact I O RTD resistance Input Module Catalog Number 1769 IR6 User Manual AB PLCs ...
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Страница 40: ...Publication 1769 UM005A EN P 3 16 Installation and Wiring ...
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Страница 116: ...Publication 1769 UM005A EN P February 2001 2001 Rockwell International Corporation Printed in the U S A ...