Siemens SIMATIC MV500 - Page 178

Process interfacing via an automation system (PLC, PC)
9.4 Control with FB 79
SIMATIC MV500
178 Operating Instructions, 03/2021, C79000-G8976-C494-05
Table 9- 39 Program selection procedure
Step
Input
Output
Description
1
DISA = 1
TRN = 0
TRG = 0
RES = 0
Program selection is prepared.
DISA must have the value "1". No edge change is necessary.
2
SEL0 = 1
SEL1 = 1
SEL2 = 0
SEL3 = 1
Select program, for example, program 11.
3
TRD = 0
RDY = 0
Program selection is started.
5
TRD = 1
RDY = 1
Program change is completed after approximately 150 ms to 15 s.
If the selected program is not saved, "TRD" and "RDY" will retain the value "0".