Input Filter - Omron WT30-CA2M Operation Manual

Function Setting Switch
Note
3-6-5

Input Filter

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Command: 24 bytes
STX 00 00 0 01
** indicates the number of Slave Stations.
Response: 33 bytes + (4 × Number of Slave Stations)
STX 00 00 00
0000 0000 0000 0000
← Data
0000
ETX BCC
Transmission data length (bytes) = Command + Response
For 5 stations, 24 + 33 + (4 × 5) = 77 bytes.
The value obtained when this total value is converted using the communica-
tions baud rate is the personal compute/PLC communications time.
List of Communications Cycle Times
Number of 1 polling
connected cycle × 2 (ms)
Stations
1
5
10
64 1280
The shaded area indicates the combinations for which communications are
enabled.
Example 1: When 5 stations are connected, and a baud rate of 38,400 bps is
used, two polling cycles are 100 ms > 71 ms (personal computer/PLC com-
munications time). Therefore, data can be read.
If communications are performed at 9,600 bps, however, the two polling
cycles will be 131 ms, and communications will not be able to be performed
within the two polling cycles. Refer to the above table and consider the serial
baud rate and number of connected stations when creating the program.
Normal Mode
Set the function setting switch as follows (I/O Slave Stations only):
Bit 2: OFF (normal mode)
ON
1 2 3 4 5 6 7 8 9 0
Input Hold
Set the function setting switch as follows (I/O Slave Stations only):
Bit 2: ON (input hold)
ON
1 2 3 4 5 6 7 8 9 0
Set the filter for I/O Slave Station input. The input filter can be set to 10 ms or
100 ms. The 10-ms filter recognizes ON inputs only when the input's contact
status (ON/OFF) is held for at least 10 ms. The 100-ms filter functions in the
same way.
01 80 0000 00 00** ETX BCC
01 01 00 00
← Entry data
Personal computer/PLC communications
9,600 bps (ms)
20 114
100 131
200 152
377
Section 3-6
time
38,400 bps (ms)
66
71
76
132
55