Festo VAEM-V-S8EPRS2 Operating Instructions Manual page 23

Parameterisation
Access Data
type
0x01 0x01
(write) (Uint08)
Tab. 28 Architecture of the Modbus TCP: select valve
Example of selecting valves 1, 4 and 6
Situation: previous valve selection is unknown and should be overwritten.
The binary code 101001 results from the selection of valves 1, 4 and 6. The binary code corresponds
to the decimal value 41.
1. Interrogation of the selected valves using
– ASCII telegram: RU08: I19S0
– Using Modbus TCP: 0000 0000 0019 00 17 0000 0007 0000 0007 0E 00 01
0013 00 00 0000 0000 0000 0000
Ä Decimal value is returned.
2. Convert decimal value to binary code and interpret è Fig.12.
3. Select the desired valves by setting the value 1 to the corresponding position in the binary code.
All non-selected valves have the value 0 at the corresponding positions.
4. Convert binary code into decimal or hexadecimal value.
5. Transfer function using
– ASCII telegram: WU08: I19S0V41
– Using Modbus TCP: 0000 0000 0019 00 17 0000 0007 0000 0007 0E 01 01
0013 00 00 0000 0000 0000 0029
save setting values
Via the system parameter [Save setting values], valve-specific configuration parameters are saved on
the product and are immediately available again after the de-energised state. Thus, with renewed
energisation, the parameterisation does not have to be carried out again.
The following configuration parameters are saved:
– nominal voltage
– inrush current
– holding current
– response time
– pickup time
– operating mode
– selected valves
– time delay
– hit-and-hold actuation time
Festo — VAEM-V-S8EPRS2 — 2020-07
System Address-
paramet- ing para-
ers index meter
subindex
0x13 0x00
Transfer Example of data area Modbus TCP
value
0x59
01 01 0013 00 00 0000 0000
(selected
0000 0059
valves 1,
4, 5 and
7)
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