Group parameters for the digital part

Name	Value	Internal value	Internal value, type	Default
Input delay	0.1 ms 1 ms 8 ms 32 ms	0 1 2 3	BYTE	0.1 ms 0x00
Detect short circuit at outputs	Off On	0 1	BYTE	On 0x01
Behaviour DO at comm. error 1)	Off Last value Last value 5 sec Last value 10 sec Substitute value Substitute value 5 sec Substitute value 10 sec	0 1 6 11 2 7 12	BYTE	Off 0x00
Substitute value at output	0 … 65535	0000h … FFFFh	WORD	0 0x0000
Preventive voltage feedback monitoring for DC0..DC7 2)	Off On	0 1	BYTE	Off 0x00
Detect voltage overflow at outputs 3)	Off On	0 1	BYTE	Off 0x00

Remarks:

1)	The parameter Behaviour DO at comm. error is apply to DC and DO channels and only analyzed if the Failsafe-mode is ON.
2)	The status “externally voltage detected” appears, if the output of a channel DC0..DC7 should be switched on while an externally voltage is connected.  In this case the start up is disabled, as long as the externally voltage is connected. The monitoring of this state and the resulting diagnosis message can be disabled by setting the parameters to “OFF”.
3)	The error status “voltage overflow at outputs” appears, if externally voltage at digital outputs DC0..DC7 and accordingly DO0..DO7 has exceeded the process supply voltage UP3 CI542-DP. The according diagnosis message “Voltage overflow on outputs ” can be disabled by setting the parameters on “OFF”. This parameter should only be disabled in exceptional cases for voltage overflow may produce reverse voltage.