turck 6827380, Instructions For Use Manual

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2020/09
7.2 Integration of the RS485/422-module
7.2.1 Data image
Process input data (PZDE)
The BL××-1RS485/422-module sends the data, received by the device, into a 128-byte receive-buf -
fer. The module then transmits the data segmented via the module bus and the gateway to the SPS.
The transmission is realized in a 8-byte format which is structured as follows:

6 bytes are used to contain the user data.

1 byte contains the diagnostics data.

1 status byte is required to ensure trouble-free transmission of the data.
Meaning of the data bits (process input)
Fig. 31: Process input data SPS
Designation Value Description
BufOvfl; Fra -
meErr; Hnd -
ShErr; HwFail -
ure; PrmErr
0 - 255 Diagnostic information (correspond to the diagnostic information in the
diagnosis telegram).
These diagnostics are always displayed and independent to the setting of
the parameter „Diagnostics".
STAT 0-1 1 The communication with the data terminal equipment (DTE) is not dis -
turbed.
0 The communication with the data terminal equipment (DTE) is dis
-
turbed. A diagnosis message is generated if the parameter "Diagnostics" is
set to "0" = release.
The diagnostic data show the cause of the communication disturbance.
The user has to set back this bit in the process output data by using
STATRES.
TX_CNT_ACK 0-3 The value TX_CNT_ACK is a copy of the value TX_CNT. The value TX_CNT
was transferred together with the last data segment of the process output
data.
The value TX_CNT_ACK is a confirmation of successful acceptance of the
data segment using TX_CNT.