Spectrum Controls 1769sc-HART Modules - Manual (Page 167)

User's Manual 0300215-03 Rev. A
Chapter 9
Diagnostics and
Troubleshooting
This chapter describes troubleshooting the isolated HART input module. This chapter
contains information on:
•
Safety considerations while troubleshooting
•
Internal diagnostics during module operation
•
Module error codes
•
Contacting Spectrum Controls, Inc. for technical assistance
Section 9.1
Safety
Considerations
Safety considerations are an important element of proper troubleshooting procedures.
Actively thinking about the safety of yourself and others, as well as the condition of your
equipment, is of primary importance.
The following sections describe several safety concerns you should be aware of when
troubleshooting your control system.
!
Attention
Never reach into a machine to actuate a switch because unexpected motion
can occur and cause injury. Remove all electrical power at the main power
disconnect switches before checking electrical connections or inputs/ outputs
causing machine motion.
9.1.1 Indicator Lights
When the green LED on the module is illuminated, it indicates that power is applied to
the module and that it has passed its internal tests.
9.1.2 Stand Clear of 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.
9.1.3 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.
9.1.4 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.