When The Alm Led Flashes; When A Module Parameter Error Is Displayed In The "Module Diagnostics" Window; When A Double Input Discrepancy Detection Error Occurs - Mitsubishi Electric R60AD8-G User Manual

When the ALM LED flashes

Check item
Check whether the system was restarted after enabling or disabling the safety
module.
When a module parameter error is displayed in the "Module
Diagnostics" window
Check item
Check whether the module configuration is correct.
Check whether a module incompatible with the SIL2 mode is used.

When a double input discrepancy detection error occurs

Check item
Check whether there is any problem with analog signal lines for modules and
relay, such as looseness or disconnection.
Check whether any measures have been taken to reduce noise.
Check "Duplex input error range setting" and "Duplicated input mismatch
detection count".
If operation is not performed normally even after the actions described above are taken, the possible cause is
a module failure. Please consult your local Mitsubishi representative.
14 TROUBLESHOOTING
310
14.3 Troubleshooting by Symptom
Corrective action
Restart the system when the safety module is enabled or disabled.
Corrective action
Check that the module configuration diagram set in GX Works3 is correct. For
details, refer to the following.
Page 235 SYSTEM CONFIGURATION
Check that modules whose firmware version and production information are
compatible with the SIL2 mode are used. Incompatible modules do not
operate normally in SIL2 mode. For details, refer to the following.
Page 240 Firmware Version for SIL2 Mode
Corrective action
• Identify the faulty area by a visual check and continuity check for analog
signal lines and relay of the channel where an error occurred.
• Check whether sensors are connected to different channels for the
R60AD8-G (Main) and R60AD8-G (Sub).
To reduce noise, take measures such as the use of shielded cables for
connection.
Set "Duplex input error range setting" and "Duplicated input mismatch
detection count" with GX Works3 so that the customer's system error range is
allowed. If "Duplicated input mismatch detection count" needs to be increased
considering noise effect, review and adjust "Duplex input error range setting".