Omron E5ZN-DRT Operation Manual page 131

Remote I/O Communications Characteristics
Maximum Processing
Time for CompoWay/F
Commands Sent to the
Temperature Controller
Refresh Time
Master Unit for CV-series
PLCs
Master Unit for CS/CJ-
series, C200HX/HG/HE (-
Z), and C200HS PLCs
116
= (No. of allocated IN Area words for a Temperature Controller + 2)
Example: Temperature Controller Unit 1 = 5 IN Area words, Unit 2 = 3 IN Area
words, Unit 3 = 2 IN Area words, yielding a total of 10 IN Area words. (
+ 2) 5 + (3 + 2)
IN communications cycle time
Note When IN Area words are not allocated for a Temperature Controller,
Decimal points are truncated, but if there was a remainder, the value of
the quotient + 1.
OUT Communications Cycle Time
OUT communications cycle time = (19 ms
words in OUT Area 1)
(The cycle time is 0 when the Output Enable Bits are OFF.)
= (Number of allocated OUT Area words for a single Temperature Control-
ler) 3
Example: Temperature Controller Unit 1 = 5 OUT Area words, Unit 2 = 4 OUT
Area words, Unit 3 = 1 OUT Area words, yielding a total of 10 OUT Area
words. ( = 5
OUT communications cycle time = 19 ms
Note Decimal points are truncated, but if there was a remainder, the value of
the quotient + 1.
The processing time depends on the command, but the maximum processing
time for commands with slow response times is 370 ms.
The refresh time is the time required for I/O data to be exchanged between
the PLC's CPU Unit and the DeviceNet Master Unit. The PLC's cycle time is
increased when a Master Unit is mounted, as shown below.
Note Refer to the PLC's Operation Manual for more details on the refresh time and
the PLC's cycle time.
The PLC's cycle time (CPU Bus Unit servicing) is increased by the amount
shown in the following table when a Master Unit is mounted to the PLC.
Process
CPU Bus Unit servicing
The PLC's cycle time (I/O refreshing) is increased by the amount shown in the
following table when a Master Unit is mounted to the PLC.
Process
I/O refreshing
5 + (2 + 2) 5 = 4)
= 18 ms
= 18 4 + 6
= 122 ms
3 + 4 3 + 1 3 = 5)
= 19 5 + 7
= 165 ms
DeviceNet Unit refreshing: 1.1 ms
DeviceNet Unit I/O refreshing:
Using Master Unit for CS/CJ-series, and C200HX/HG/HE
(-Z) PLCs
1.72 + 0.022 × number of words (ms) (See note.)
Using Master Unit for C200HS PLCs
2.27 + 0.077 × number of words (ms) (See note.)
Section 7-1
+ 6 10
10
) + (7 ms total allocated
+ 7 10
10
Processing time
Processing time
5
= (5
= 1.
is
is