Warning Display; When Internal Fault Found - Hitachi SJ Series Safety Function Manual

Chapter 9

9.3 Warning display

In case that a warning (one of [P-1A] / [P-2A] / [P-1b] / [P-
2b] / [P-1C] / [P-2C]) is displayed on the operator keypad,
there is a possibility that input state of ST1 and ST2 is
inconsistent. Please check that the two STO inputs are
given properly.
In case the inconsistent state of ST1/ST2 during state
transition is inevitable because of system configuration,
please adjust the parameter [bd-02] suitable for the system.
Error and Troubleshooting

9.4 When internal fault found

Please contact the nearest Hitachi distributor when it has
been found a malfunction of the STO function.
- [E091] is occurred
- STO or any warning is displayed on the operator keypad
even if the power is turned on with the wiring set to the
factory default.
9-2