Contents Of Data Designation Items Of A Compatible 1E Frames - Mitsubishi MELSEC Q Series Reference Manual

6.1.3 Contents of data designation items of A compatible 1E frames

B7 B6
1 Stations connected to an external device (local station)
2 Stations connected to an external connection station by multidrop link
Station on CC-Link IE Controller Network, CC-Link IE Field Network,
MELSECNET/H, MELSECNET/10
3
(excluding 1 and 2 above) (
Remote master station on the MELSECNET/H (when an external device is
4
connected to the E71 in the remote I/O station)
6 - 7
This section explains the data items of commands and responses when
communicating using the MC protocol and A compatible 1E frames.
In the response that is returned by the E71 to an external device, the data is
automatically specified by the E71; the user does not need to specify it.
(1) Header
The header is for TCP/IP or UDP/IP.
Add the header for a command message transmitted from the external device to
the programmable controller CPU on the external device side.
It is not necessary for users to set the header for a response message
transmitted from the programmable controller CPU to the external device
because it is automatically added by the E71.
(2) Subheader
The format of the subheader is configured as follows.
B5 B4 B3 B2
(3) PC number
The PC numbers are used to identify which programmable controller on CC-Link
IE Controller Network, CC-Link IE Field Network, MELSECNET/H,
MELSECNET/10 to be accessed.
The PC numbers are designated by FF
stations connected to the network module (maximum range 00
External device access station
1
)
1 Applicable when accessing a modules on the network designated in the "Valid
module during other station access" setting by a network module (Ethernet, CC-
Link IE Controller Network, CC-Link IE Field Network, MELSECNET/H,
MELSECNET/10).
2 The station No. 41
CC-Link IE Field Network cannot be specified.
(a) When communicating in binary code, the PC number is expressed in binary
code.
(b) When communicating in ASCII code, the PC number is expressed in
hexadecimal ASCII code.
6 WHEN COMMUNICATING USING THE A COMPATIBLE 1E FRAMES
B1 B0
Command/response type
(This differs for each function. For details,
refer to Section 6.2 and succeeding sections.)
Command/response flag
For command: 0
For response: 1
H
01 to 40 (1 to 64): Station number of access station. (
H H
to 78 (65 to 120) of the CC-Link IE Controller Network,
H H
or in the station number range of the
PC number designated by external device
FF
H
FF
H
(Not accessible)
to 40 ).
H H
2
)
6 - 7