Parker Hannifin Corporation
Pneumatic Division Europe
www.parker.com/pde
42
External monitoring program for Rockwell 1734-OB8S or 1734-OBV2S with 1734-IB8S
a) If I0 = I1 = 1 AND safety hardwire circuit in Active state AND no faults present THEN SET O0 = O1 = 1 when
commanded
b) Sensor discrepancy error: I0 <> I1 (max. discrepancy time = 150 msec)
c) Loss of pressure error: O0 = O1 = 1 AND I0 = I1 = 0
followed by I0 = 1 OR I1 =1 AND O0 = O1 = 1
d) System pressure error: O0 = O1 = 1 AND I0 = I1 = 1 for x amount of time (where x is system pressurization time
dependent on volume) Default 3 secs.
e) IF sensor discrepancy error OR loss of pressure error OR system pressure error THEN reset O0 = O1 = 0
Errors must be reset only after maintenance acknowledgement
* Programs provided in this integration guide are for reference only. These programs have not been certified or tested
unless stated otherwise.
Integration Guide
Rockwell 1734-OB8S or 1734-OBV2S
FRL-SIF-120
_EU
Parker Pneumatic
