Chapter 14 Fault Codes and DescriptionsCP2000
14-39
ID* Display on LCD Keypad Fault Name Fault Descriptions
72
STO Loss 1 (STL1) STO1–SCM1 internal loop detection error
Action and Reset
Action level Hardware detection
Action time Immediately act
Fault treatment parameter N/A
Reset method Hardware failure, and cannot reset. Cycle the power.
Reset condition N/A
Record Yes
Cause Corrective Actions
STO1 and SCM1 short circuit lines
are not connected
Connect the short circuit line
Hardware failure
After you make sure all the wiring is correct, if STOL fault still exists after cycling
the power, please return to the factory for repair.
Bad connection of the IO card
Check if the PIN of IO card is broken?
Check if the IO card connects to the control board correctly, and if the screws
are tightened well?
The IO card does not match the
version of the control board
Contact local agent or Delta
ID* Display on LCD Keypad Fault Name Fault Descriptions
73
Emergency stop for
external safety (S1)
Emergency stop for external safety
Action and Reset
Action level Hardware detection
Action time Immediately act
Fault treatment parameter N/A
Reset method Manual reset
Reset condition Reset only after S1 error is cleared.
Record Yes
Cause Corrective Actions
The switch action of S1 and SCM
(OPEN)
Reset the switch and cycle the power.
S1 and SCM short circuit lines are
not connected
Re-connect the short circuit lines
Malfunction caused by interference
Verify the wiring/grounding of the main circuit, control circuit and encoder to
prevent interference.
Hardware failure
If S1 fault still exists after cycling the power, please return to the factory for
repair.
Poor connection of the IO card
Check if the PIN of IO card is broken?
Check if the IO card connects to the control board correctly, and if the screws
are tightened well?
The IO card does not match the
version of the control board
Contact local agent or Delta
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