321
I/O pts to refresh
Time required
(ms)
512
7.4
256
4.1
128
2.7
64
1.7
Unit
Time required per Unit
C200H-ID501/215
0.6 ms
C200H-OD501/215
0.6 ms when set for 32 I/O pts.
C200H-MD501/215
1.6 ms when set for dynamic I/O
C200H-CT001-V1/CT002
2.6 ms
C200H-NC111/NC112
2.5 ms
C200H-NC211
5.0 ms
C200H-AD001
1.3 ms
C200H-DA001
1.0 ms
C200H-TS001/TS101
1.2 ms
C200H-ASC02
1.9 ms normally, 5.0 ms for @ format
C200H-IDS01-V1/IDS21
2.0 ms normally, 5.5 ms for command transfer
C200H-OV001
4.1 ms
C200H-FZ001
2.0 ms
C200H-TC001/002/003/
101/102/103
3.0 ms
C200H-CP114
2.5 ms
C200H-AD002
1.4 ms
C200H-PID
jj
3.0 ms
Unit
Time required per Unit
C200H-ID216
0.18 ms
C200H-OD218
0.14 ms
C200H-ID217
0.31 ms
C200H-OD219
0.23 ms
NT Links
If the PC is connected to a Programmable Terminal (PT) via a C200H Interface
Unit, the times shown in the following table will be required to refresh I/O for the
PT.
Number of table entries for PT
I/O refresh time
Minimum setting:
Character string table: 0
Numeral table: 0
2.5 ms
Maximum setting:
Character string table: 32
Numeral table: 128
5.4 ms
Within the PC, the watchdog timer measures the cycle time and compares it to a
set value. If the cycle time exceeds the set value of the watchdog timer, a FALS
9F error is generated and the CPU stops. WDT(94) can be used to extend the set
value for the watchdog timer.
PC Link Unit I/O Refresh
Special I/O Unit Refresh
Group-2 High-density I/O
Unit Refresh
Watchdog Timer and Long
Cycle Times
Cycle Time
Section 6-1