Moeller MV4 Series - Notes; Receive TP1 Procedure Command

Communications Card Description ZB4-601-IF1, ZB4-609-IF1 4-43
Moeller 07/01 AWB-C2700-1347GB
8.16.7 Notes
The ZB4-601/609-IF1 awaits the first ACK (06
h
) within VZ in response to a send request to send data.
If this is the case, the data and checksum are then transferred. If not, the ZB4-601/609-IF1 repeats the
request with STX (02
h
).
If the ZB4-601/609-IF1 receives the second ACK after sending the data, the data is considered as having
been correctly transferred and the transfer is finished.
If the VZ has elapsed or a different character to ACK is received, the transfer is restarted.
These notes also apply to the “RECEIVE” command.
8.16.8 Receive TP1 procedure command
Troubleshooting see also 6.16.4 and 6.16.7
ZB4-601/609-IF1 PLC REMARKS
STX (02h) Start transfer
ACK (06h) PLC ready
RECEIVE (44h) Data direction PLC –> ZB4-601/609-IF1
D_NR Data word number (0 to 2048)
CR (0Dh) String end
ETX (03h) End transfer
CHK
Checksum (addition of all bytes from RECEIVE to and incl. ETX)
STX (02h) Header correct, transfer start
D_VAL Value of data word
CR (0Dh) String end
ETX (03h) End transfer
CHK Checksum (Addition of all bytes from D_VAL to and incl. ETX)