Architecture Ascii Telegram - Festo VAEM-V-S8EPRS2 Operating Instructions Manual

Parameterisation
Function Index
I
ModbusTcpTi- 56
meoutSoll
ModbusTcpTi- 57
meoutIst
Tab. 13: Valve control functions
7.2

Architecture ASCII telegram

1
Fig. 4: Structure of the ASCII telegram
1 Command area with access type and data
type
2 Separator
3 Identification area with index and sub-index
Command area
The access type and the data type are specified in the command area.
Identification area
The identification area consists of the index and the subindex. The index denotes the system param-
eter. The subindex denotes the addressing at which the function of the system parameter is to be
executed.
Transfer value
When writing an ASCII telegram the transfer value must always be specified with V in front. When
reading, the transfer value is omitted and is returned as an answer.
Command end character
The command end character is not specified in this documentation because the need for a command
end character depends on the terminal software used.
Festo — VAEM-V-S8EPRS2 — 2021-10a
Hex Data Value range
value type
index
38 Uint16 0 ... 50265535
39 Uint16 0 ... 50265535
2 3
Default value
0
(Timeout inac-
tive)
0
4
4 Transfer value
5 Command end character
Description
Change TCP/IP connec-
tion timeout.
Minimum timeout is
1000 ms.
Values between
0 ... 1000 are increased
to 1000.
Display TCP/IP connec-
tion timeout.
5
13