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MELSEC-Q
1 OVERVIEW
1. OVERVIEW
This is the user's manual for the QJ71PB92D PROFIBUS-DP interface module
(hereafter abbreviated as " QJ71PB92D. When explain separately, however,
abbreviated as QJ71PB92D), which is used to connect a MELSEC-Q series
programmable controller to a PROFIBUS-DP network.
The QJ71PB92D operates as a master station (class 1) in the PROFIBUS-DP network.
1.1 Software Configuration
Automatic refresh,
FROM/TO,
Dedicated instruction
User Interface
Direct Data Link Mapper
FDL
PHY
(DDLM)
empty
FMA1/2
MELSEC Q Series PC
Communication using a buffer memory
Portion where master
PCB is installed
Layer 3 to 7
Layer 2 Datalink layer
Layer 1 Physical layer
Portion where slave
PCB is installed
The QJ71PB92D has a physical layer, data link layer, DDLM, and user interface that
conform to PROFIBUS-DP, and communicates data with the PLC CPU by using a
buffer memory.
The main application of PROFIBUS-DP is networks that execute high-speed
communication at the level of sensors and actuators.
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