Chapter 10 Changing Data Communication Monitoring Time - Mitsubishi Electric MELSEC iQ-R Series User Manual

10
CHANGING DATA COMMUNICATION
MONITORING TIME
The monitoring time is time used by C24 to monitor the receiving interval time between each byte when receiving data from
the target device, the programmable controller CPU processing time, and the time it takes to transmit to the target device.
The monitoring time can be set for each interface. C24 uses the monitoring time set by the user to control data transmission to
and reception from the target device.
Set the monitoring time in accordance with the specifications of the target device.
C24 monitoring times are listed below.
: Configurable : Non-configurable, : Not used
Monitoring time
No-reception monitoring time Method
*1
(timer 0) 0
Method
*1
1
Response monitoring time (timer 1)
Send monitoring time (timer 2)
Transmission wait time
*1 Nonprocedural and no-reception monitoring time method
The C24 input signal which turns ON when the no-reception monitoring time (timer 0) timed out differs.
Nonprocedural and no-reception monitoring time method
Method 0
Method 1
Ex.
Data communication using MC protocol
Command message
Head data
Target device
CPU module
Timer 0 monitoring time
Timer 0 elapsed time reset
C24 default value
0 bytes
(Unlimited wait)
5 seconds
3 minutes
0 ms
Last data
Response message
Timer 1 monitoring time
Message wait time
Timer 1 elapsed time reset
Protocol that can monitor
the time
MC Non Bi
  
  
  
  
  
Input signal which turns ON
Reception abnormal detection (X4, XB)
Reception data read request (X3, XA)
1 byte
Head data Last data
C24 ready to
receive data
state
Timer 2 monitoring time H/W gate OFF time
Timer 2 elapsed time reset
10 CHANGING DATA COMMUNICATION MONITORING TIME
Remarks
Pd
 Transmission time for the set number
of byte (depending on the
transmission speed)

 Transmission only for the bidirectional
protocol.
 
 No wait time
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