STATUS DONE BUSY ERROR Description
818Dh 0 0 1 Server returns wrong transaction ID.
8200h 0 0 1 Another Modbus request is processed at the time via the
port (PROTOCOL_TIMEOUT).
9.1.1.2 Example
With Function code 03h, starting from address 2000, 100 register are to be read from a
Modbus/TCP server and stored in flag area starting from MB200. Errors are to be stored.
CALL FB 65 , DB65
REQ :=M100.0
ID :=W#16#1
DONE :=M100.1
BUSY :=
ERROR :=M100.2
STATUS :=MW102
CONNECT:=P#DB255.DBX 0.0 BYTE 64
UN M 100.2
SPB ERR1
L MW 102
T MW 104
ERR1: NOP 0
U M 100.1
R M 100.0
CALL FB 70 , DB70
REQ :=M101.0
ID :=W#16#1
MB_FUNCTION :=B#16#3
MB_DATA_ADDR:=W#16#7D0
MB_DATA_LEN :=100
MB_DATA_PTR :=P#M 200.0 BYTE 200
DONE :=M101.1
BUSY :=
ERROR :=M101.2
STATUS :=MW106
UN M 101.2
SPB ERR2
L MW 106
T MW 108
ERR2: NOP 0
U M 101.1
R M 101.0
1. Calling of FB 65 (TCON) to establish a communication connection with the partner
station.
2. Calling the handling block of the Modbus/TCP client with the correct parameters.
3. There is no connection to the partner station and MW102 returns 7000h.
4. Set M100.0 in the CPU to TRUE.
ð
If M100.0 is automatically reset, the connection to the partner station is estab-
lished and MW108 returns 7004h.
Task
OB1
OB1 - Description
VIPA SPEED7
Modbus Communication
TCP > FB 70 - TCP_MB_CLIENT - Modbus/TCP client
HB00 | OPL_SP7 | Operation list | en | 18-30 185
To Next Page
Loading...
