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Mitsubishi Electric Melsec Q Series User Manual page 126

Profibus-dp master module
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4
FUNCTIONS
(2) Executing time control function
4
- 17
4.3 PROFIBUS-DPV2 Functions
4.3.1 Time control over DP-Slaves
(b) Request for reading time data
The time data read request is used to read the time data written to a DP-Slave by
another time master out to the QJ71PB92V.
This request can be used when two or more time masters exist on the same
network.
Time master 1
Power
QCPU
supply
module
Time data
read request
Time data
DP-Slave
Figure 4.14 Time Data Read Request
Execute the time control function by the following procedure:
(a) Write request data to the Time control setting request area (Un\G26784 to
Un\G26792).
(b) Turn ON the Time control start request signal (Y19).
(c) When the time control is completed, the execution result is stored in the Time
control setting response area (Un\G26800 to Un\G26812), and the Time control
start response signal (X19) turns ON.
(d) Check the execution result stored in the Time control setting response area
(Un\G26800 to Un\G26812), and turn OFF the Time control start response signal
(X19).
Remark
For program examples on the time control function, refer to the following:
• Single CPU system:
• Redundant system:
QJ71
PB92V
Time data
Time data
DP-Slave
Section 7.6
Section 7.9.6
Time master 2
Time setting
Time data
DP-Slave

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