Omron SRM1-C01-V2 - Page 8

17
Master Unit
CQM1-SRM21-V1
Master Unit for CQM1
A maximum of 128 I/O points available (Possible to
set 32, 64, or 128 I/O points).
Connects to a maximum of 16/32 Slaves.
Communications cycle time: 0.5 ms max. (at baud
rate 750 kbps).
Communications distance: Extended to 500 m
max. (at baud rate 93.75 kbps).
Connection to Analog Terminals now supported.
RC
Ordering Information
PC Max. number of I/O points Model
CQM1-series PC 128 points (64 inputs/64 outputs) CQM1-SRM21-V1
Specifications
Communications Specifications
Communications method CompoBus/S protocol
Coding method Manchester coding method
Connection method Multi-drop method and T -branch method (see note 1)
Communications baud rate 750,000 bps, 93,750 bps (see note 2)
Communications
cycle time
High-speed
comm nications
0.5 ms with 8 Slaves for inputs and 8 Slaves for outputs
cycle time communications
mode
0.8 ms with 16 Slaves for inputs and 16 Slaves for outputs
Long-distance
comm nications
4.0 ms with 8 Slaves for inputs and 8 Slaves for outputs
communications
mode
6.0 ms with 16 Slaves for inputs and 16 Slaves for outputs
Communications cable 2-conductor VCTF cable (0.75 x 20)
Dedicated flat cable
Communications
distance
High-speed
communications
mode
VCTF cable:
Main line length: 100 m max.
Branch line length: 3 m max.
T otal branch line length: 50 m max.
Flat cable:
Main line length: 30 m max.
Branch line length: 3 m max.
T otal branch line length: 30 m max.
(When flat cable is used to connect fewer than 16 Slaves, the main line can be up to
100 m long and the total branch line length can be up to 50 m.)
Long-distance
communications
mode
VCTF cable::
Main line length: 500 m max.
Branch line length: 6 m max.
T otal branch line length: 120 m max.
Max. number of connecting nodes 32
Error control checks Manchester code check, frame length check, and parity check
Note: 1. A terminator must be connected to the point in the system farthest from the Master .
2.
The communications baud rate is switched with the DIP switch.