Cause : Digital output overload comes when the I/O Overload trip indicates that the total current drawn from 24 V user supply or from the digital output has exceeded the limit. A trip is initiated if one or more of the following conditions:

• Maximum output current from one digital output is 100 mA.
• The combined maximum output current from outputs 1 and 2 is 100 mA.
• The combined maximum output current from output 3 and +24 V output is 100 mA.

1. Check total loads on digital outputs.
2. Check control wiring is correct.
3. Check output wiring is undamaged.