Acpu Monitoring Timer - Mitsubishi Electric MELSEC IQ-R series Reference Manual

ACPU monitoring timer

Set the wait time up to the completion of reading and writing processing.
• 0000H (0): Wait infinitely (Waits until a processing is completed.)
• 0001H to FFFFH (1 to 65535): Waiting time (unit: 250 ms)
To perform normal data communication, using the timer within the setting range in the table below is recommended depending
on the communication destination.
Access target
Connected station (host station)
Other station
When accessing QnACPU or ACPU for the first time, the wait time for CPU monitoring timer is required before
receiving a response message because QnACPU identifies the CPU type. Be sure to set a value within the
range of recommended range.
Setting method
■Data communication in ASCII code
Convert the numerical value to 4-digit ASCII code (hexadecimal), and send it from the upper digits.
■Data communication in binary code
Send 2-byte numerical values from lower byte (L: bits 0 to 7).
Ex.
When specifying '10H' for the monitoring timer
ASCII code
0 0 1 0
30 30 31 30
H H
H H
18 COMMUNICATING USING 1E FRAMES
394
18.2 Details of Setting Data
The recommended value for monitoring timer
1H to 28H (0.25 s to 10 s)
2H to F0H (0.5 s to 60 s)
Binary code
10 00
H H