11
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11.1 Scan Time
11.1.2 Time required for each processing included in scan time
11
CPU MODULE PROCESSING TIME
(7) Service processing time
Service processing indicates the processing for communication with GX Developer
and external device.
(a) Basic model QCPU
Table 11.12 shows the processing time at monitoring data by GX Developer.
* 1 : Time taken to read an 8k-step program from the program memory.
* 2 : Time taken when 32 points have been set in registration monitor.
* 3 : Time taken when a 100-step ladder is added.
* 4 : Time taken when access is made via the MELSECNET/H, Ethernet, CC-Link or serial
communication module.
• Communication with serial communication module or Ethernet interface
module
This indicates the time taken to communicate with the serial communication
module or Ethernet module.
Refer to the following manual for the time taken for communication with each
module.
Q Corresponding MELSECNET/H Network System Reference
Manual
Table11.12 Monitor processing time by GX Developer
Function
When connected to RS-232 of host station
CPU module
When connected to other station
*4
Q00JCPU
Q00CPU
Q01CPU
Q00JCPU
Q00CPU
Q01CPU
Read of program from PLC
*1
1.6ms
1.3ms
1.2ms
2.3ms
1.9ms
1.8ms
Device monitor
*2
1.2ms
1.0ms
0.9ms
2.4ms
2.0ms
1.9ms
Online change
*3
1.0ms
1.0ms
1.0ms
1.9ms
1.6ms
1.5ms