Dimensions; Performance - Omron CQM1-ARM21 Operation Manual

Dimensions

3-2 Dimensions

Dimensions

3-3 Performance

Input response time
Output response time
I/O response time
Asynchronous cycles
The following diagram shows the dimensions of the Master Unit. Refer to the
CQM1 Operation Manual (W226-E1) for the dimensions of a complete PLC
system.
All dimensions are in mm.
The performance of the CQM1-ARM21 can be expressed in several ways. A
common method is by definition of the input and output response times.
The input response time is the elapsed time between the moment that an
input on a slave unit changes state, and the change of state of the
corresponding data bit in the PLC memory.
The output response time is the opposite: the elapsed time between the
change of state of a data bit in the PLC memory, and the moment that the
corresponding output on a slave unit changes state.
Since AS-Interface is an open bus system, it is possible to use slave units
from different vendors in one network. The internal delay times of I/O signals
in these slave units should be considered in the performance measures.
Another performance measure of the complete system is the I/O response
time. This is measured by transferring an input signal from a slave, via the
PLC program, to the output of another (or even the same) slave. In this case
the delay will also depend on the PLC cycle time.
Since in the CQM1-ARM21 the PLC cycle and the AS-Interface cycles are not
synchronised, the response times are not constant values, but can be
guaranteed to fall between a minimum and a maximum value.
Section 3-2
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