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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-PIDjj 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