Filter
Top Products
CHAPTER6 FUNCTIONS
1
2
3
4
5
6
7
8
6.12 Writing Programs While CPU Module is in RUN Status
6.12.3 Precautions for online change
6 - 67
(4) Writing to the program memory during online change and T/C setting value
change
Contents changed due to online change and TC setting value change are automatically transferred to the
program memory simultaneously when the data are written to the program cache memory.
The time required for writing data to the CPU module in the RUN status and changing T/C setting value is
increased due to automatic transfer of the program memory by the time shown in Table6.21.
Ts: Scan time (s)
Since the number of writes to the program memory (Flash ROM) is limited (up to 100,000 times), set the
automatic transfer to the program memory to be disabled when data are written to the CPU module in the RUN
status and changing T/C setting value frequently.
Table6.21 Time increased due to automatic transfer of data to the program memory
CPU module Transfer time
Q00UJCPU,Q00UCPU,Q01UCPU,Q02UCPU
Ts 320 + 4.8 (s)
Q03UDCPU,Q04UDHCPU,Q06UDHCPU,Q03UDECPU,
Q04UDEHCPU,Q06UDEHCPU
Ts 260 + 4.7 (s)
Q10UDHCPU,Q10UDEHCPU
Ts 439 + 6.2 (s)
Q13UDHCPU,Q13UDEHCPU
Ts 600 + 8.0 (s)
Q20UDHCPU,Q20UDEHCPU
Ts 839 + 11.4 (s)
Q26UDHCPU,Q26UDEHCPU
Ts 1100 + 15.0 (s)