ABB S800 I/O User Manual page 77

‡ 9vtv‡hyÃDƒˆ‡ÃTvthy†
A digital input signal can be checked as shown in
following procedure as a guide:
–
–
–
‡ 6hy‚tÃDƒˆ‡ÃTvthy†
Figure 2-21
checked. Proceed as follows to check an analog input channel:
–
–
–
Pˆ‡ƒˆ‡ÃTvthy†
Figure 2-22
application.
DO Modules provide a field output connector and DO channel LED's.
AO Modules provide a field output connector.
3BSE 020 923R101
Simulate the digital input signal as close to the process transducer as
possible or activate the transducer itself.
Check that the corresponding yellow LED on the input module concerned
illuminates and that the change is shown accordingly in the overlaying
controller
Change the input signal to a low level. Check that the yellow LED on the
input board extinguishes and that the display value has changed.
shows where an analog input signal of an input channel can be
Simulate the analog input signal as close to the process
transmitter/transducer as possible.
Check that the simulated signal is available at the screw terminal of the
corresponding connection.
Check that the value shown on the display screen corresponds to the
simulated value set in the field. Check the complete signal range.
shows where an output signal can be checked in an S800 I/O
Brr…hyÃDs‚…€h‡v‚ÃhqÃD†‡hyyh‡v‚ÃV†r…¶†ÃBˆvqr
Figure
Trp‡v‚Ã!# Brr…hy
2-21. Use the
67