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Operating Instructions
5. Troubleshooting and Maintenance
5.1 Troubleshooting Lockout Conditions
A lockout condition causes the OSSD output to turn OFF, sending a stop signal to
the guarded machine. A lockout condition is indicated by the Red status indicator
flashing and an error code appearing in the Diagnostic Display. To clear a lockout
condition, the failure must be corrected, the associated input must properly
cycled (if fault was due to an input failure), or a reset routine must be performed.
To perform a reset, close the reset input, hold closed for at least 1/4 second, but
no longer than 2 seconds, and then re-open the input.
5.2 Diagnostic Display
The Module's Diagnostic Display is useful for monitoring the safeguarding sys-
tem and for quickly diagnosing problems. See Figure 5-1 for a list of status
codes and their meanings, along with recommended corrective actions.
5.3 Effects of Electrical Noise
The Module is designed and manufactured to be highly resistant to electrical
noise and to operate reliably in industrial settings. However, serious electrical
noise may cause a random lockout condition.
Check the following if a noise-related error code is displayed and other remedies
have not cleared the problem:
• Poor connection between the Module and earth ground. Use a short wire from
the earth ground screw to the nearest location on a grounded metal mounting
surface.
• Sensor wires or input/output wires routed too close to "noisy" wiring.
In extreme conditions, it may be necessary to use shielded cabling or relocate the
Module, mute devices, and cabling away from the source of the noise. All con-
nectors have an earth ground connection (e.g., pin 5 of the Euro-style connec-
tors) to assist in shielding cables, if necessary.
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MM-TA-12B Muting Module
Instruction Manual
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