Recv Command (Modbus Function Code Unspecified Type) - Panasonic FP7 CPU Unit User Manual

MODBUS TCP Master/Slave Communication

6.3.3 RECV Command (MODBUS Function Code Unspecified Type)

 Command format
 Operand
Items Settings
i Specify the operation unit.
S1 Specify the partner station no.
Specify the device initial address of the source node data area in the
S2 partner node.
(Note 1) (Note 2)
n Specify the No. of sent data. (Note 3)
Specify the device initial address of the receiver node data area in the
D1
source node. (Note 1)
Specify the device area in the source node to save the execution result
D2
code (one word).
(Note 1) Types of devices and transmission methods to be specified for operands [S2] and [D1], and MODBUS
function codes to be used for command execution vary.
Device to be specified
for [S2] and [D1]
16 bit device
WX, WY, WR, WL, DT, LD
1 bit device
X, Y, R, L, DT, n, LD, n
(Note 2) Bit device L; DT, n; and LD, n cannot be specified for the header of the sender data in the partner node.
(Note 3) The No. of sent data is on a word basis for register transmission, and on a bit basis for bit transmission.
(Note 4): Devices that can be specified for D1 are: WX, WY, WR, WL, DT, LD.
(Note 5): Devices that can be specified for D2 are: WX, WY, WR, WL, DT, LD. Saved as one word in the specified area.
0: Normal completion
1: Communication port is being used for master communication
2: Communication port is being used for slave communication
3: No. of master communication commands that can be used simultaneously has been exceeded
4: Sending timeout
5: Response reception timeout
6: Received data error
6-8
Transmission
method
Read Coil Status (01)
Read Input Status (02)
Register
transmission
Read Holding Registers (03)
Read Input Registers (04)
Read Coil Status (01)
Bit transmission
Read Input Status (02)
Setting range
US / SS
H1 - HF7 (1 - 247)
H0 - HFFFF (0 - 65535)
1 - 127 words
1 - 2040 bits
(Note 4)
(Note 5)
MODBUS function codes
to be used for command execution