Siemens SIMATIC MV440 Operating Instructions Manual page 299

Step
1
2
3
5
Note
If the selected program is not saved, TRD and RDY will retain the value 0.
SIMATIC MV420 / SIMATIC MV440
Operating Instructions, 04/2013, A5E02371045-06
Input Output Description
DISA=1 Program selection is prepared.
TRN=0 DISA must have the value 1. No edge change is necessary.
TRG=0
RES=0
SEL0=1 Select program, for example, program 11.
SEL1=1
SEL2=0
SEL3=1
TRD=0 Program selection is started.
RDY=0
TRD=1 Program change is completed after approximately 150 ms to 15 s.
RDY=1
Process interfacing via an automation system (PLC, PC)
10.5 Controlling the I/O interface "DI/DO"
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