[Design Precautions]
WARNING
When a communication error occurs on PROFIBUS-DP, the status of t he faulty station is as shown
below.
Create an interlock circuit in the sequence progra m using the communication status information to
ensure the system operates safely (Input X1, buffer memory 5A20 H to 5B19 H (23072 to 23321)).
An erroneous output or malfunction may cause accidents.
(1) The QJ71PB92V holds the input data before the communication failure.
(2) When the QJ71PB92V has gone down, the output status of each DP-Sla ve is dependent on the
QJ71PB92V parameter setting on GX Configurator-DP.
(3) When a DP-Slave has gone down, the output st atus of the other DP-Sla ves is dependent on the
QJ71PB92V parameter setting on GX Configurator-DP.
Do not output the "use prohibited" signal as the output signal to an intelligent function module from
the programmable controller CPU.
Doing so may cause malfunction of the programmable controller system.