Expanded System Configuration; Serial Communications System - Omron CQM1H - 08-2005 Operation Manual

Expanded System Configuration

Note
1-3

Expanded System Configuration

1-3-1

Serial Communications System

Personal computer
or
Programming
Console bus
Peripheral bus
Host Link
No-protocol
Host Link
No-protocol
1:1 Data Link
NT Link (1:1
mode/1:N mode)
20
Refer to the CQM1H Programming Manual for the number of words allocated
to each Unit and other information on memory allocation to Units.
1. It is possible to exceed the maximum number of Units without exceeding
the maximum number of I/O points (and words allocated). For example,
with the CQM1H-CPU61, if 12 Units that are allocated 1 word each are
connected, the total number of words allocated will be 13 (including the 1
word allocated for the CPU Unit built-in inputs), which is less than the spec-
ified maximum. The number of Units, however, exceeds the maximum of
11.
2. It is also possible to exceed the maximum number of I/O points (and words
allocated) without exceeding the maximum number of Units. For example,
with the CQM1H-CPU61, if 8 Units that are allocated 4 words each are
connected, the maximum number of Units is not exceeded. However, the
total word allocation will be (4 × 8) + 1 = 33 words (including the 1 word
allocated for the CPU Unit built-in inputs), and so consequently the maxi-
mum number of 32 words is exceeded.
The CQM1H system configuration can be expanded by using the following
serial communications ports.
• CPU Unit built-in ports, 2 ports: Peripheral port and RS-232C port
• Serial Communications Board ports, 2 ports: RS-232C port and RS-422/
485 port (CQM1H-CPU51/61 only)
Programming Console
RS-232C port
(CPU Unit)
RS-422A/485 port
(Serial Commu-
nications Board)
Protocol Macro
Host Link
No-protocol
1:1 Data Link
NT Link (1:1
mode/1:N mode)
Peripheral port (CPU Unit)
RS-232C port (Serial Communications Board)
Section 1-3
Protocol Macro
Host Link
No-protocol
1:1 Data Link
NT Link (1:1 mode/1:N mode)