Other Station Device Access - Mitsubishi Electric MELSEC Q Series User Manual

(4) Function to use
The dedicated function is used from the user program to access channels and internal buffer for message
reception. Functions used for message communication are indicated below.
(a) Bus interface functions
Function name
QBF_SEND
QBF_RECV
(b) MELSEC data link functions
Function name
mdSendEx
mdReceiveEx
● Proper use of dedicated function libraries
To access to module(s) in the same C Controller module, use of bus interface functions better improves the user program
processing performance.
13.3.2

Other station device access

Access to the other devices is a method to access the other station device(s) that is relayed via the network directly
from the user program. Access to target network module(s) and controlled CPU module(s) is allowed.
(1) Function to use
The dedicated function is used from the user program to access the other station device(s).
Functions used for other station access are indicated below.
(a) MELSEC data link functions
Function name
mdSendEx
mdRandWEx
mdDevSetEx
mdDevRstEx
mdReceiveEx
mdRandREx
The bus interface functions can be used for access to module(s) in the same C Controller module.
Specify the other station device(s) by using each function for direct access and buffer memory access.
(2) Accessible range of reach function
For accessible range over each network, refer to the following.
Page 366, Section 22.5
CHAPTER 13 FUNCTIONS ACCESSED VIA A NETWORK MODULE
Sends a message to the other station via CC-Link IE Controller Network module.
Receives a message from the other station via CC-Link IE Controller Network module.
Sends a message to the other station via CC-Link IE Controller Network module.
Receives a message from the other station via CC-Link IE Controller Network module.
Writes data directly into the other station device(s).
Reads data directly from the other station device(s).
Function
Function
Q24DHC-LS
Q24DHC-V Q24DHC-VG
Function
13
Q26DHC-LS
Q12DC-V
223