wtw TresCon UNO A111, Operating Manual

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Appendix TresCon UNO
8 - 20 ba43134e08 05/2017
8.4.3 Commands for PROFIBUS
PROFIBUS connection
PROFIBUS record (PBP)
Note
Further information on wiring, configuration and the record can be
found in the "PKV 30-DPS instrument manual" and the manual "Con-
nection of WTW measured value recording systems to the PROFIBUS-
DP" that are enclosed in the PKV 30-DPS converter.
PKV 30-DPS
RS 485 Profibus DP
PC
WTW monitor
with RS 485 option
TresCon

Handshake
(binary) this byte must be toggled (1<->0),
in order to trigger a data transfer on the
RS485 side

Slave address
(binary) RS485 address of the measuring transmitter
(1...31)

Length information
(binary) Length of the ASCII message in bytes (1...61)

ASCII message The return values in the response are separa-
ted by spaces.
The length of the response is variable.
PBP overhead PBP message
64 bytes (fixed length)
PBP overhead
1 byte 1 byte 1 byte n bytes
Handshake Slave address
RS485
Length information
n ASCII ASCII
message