Omron CPM1 Programming Manual

91
Communications Functions Section 1-9
Data length: 7 bits
Stop bits: 2 bit
Parity: Even
Baud rate: 9,600 bps
Transmission delay: None
Note The above setting apply to CPU Units manufactured from July 1995 (lot num-
ber **75 for July 1995). For CPU Units manufactured before July 1995 (lot
number **65 for June 1995), only 1 stop bit will be set and the baud rate will
be 2,400 bps.
The settings in DM 6645 and DM 6650 determine the main communications
parameters, as shown in the following diagram.
One-to-one Links To use a 1:1 link, the only settings necessary are the communications mode
and the link words. Set the communications mode for one of the PCs to the
1:1 master and the other to the 1:1 slave, and then set the link words in the
PC designated as the master. Bits 08 to 11 are valid only for the master for
link one-to-one.
Note One-to-one link communications are possible for the RS-232C port only. This
setting is not possible for the peripheral port. A 1:1 NT Link cannot be used
with the CQM1-CPU21-E.
Host Link Node Number
A node number must be set for host link communications to differentiate
between nodes when multiple nodes are participating in communications.
This setting is required only for host link communications. To use host link
communications, the host link must be specified as the communications mode
and the communications parameters must be set (see following section).
Set the node number to 00 unless multiple nodes are connected in a network.
Communications mode
0: Host link
1: RS-232C
2: One-to-one link slave
3: One-to-one link master
4: One-to-one NT Link (See note.)
15 0
Bit
DM 6645: RS-232C port
DM 6650: Peripheral port
Link words for one-to-one link
0: LR 00 to LR 63
1: LR 00 to LR 31
2: LR 00 to LR 16
Port settings
00: Standard communication conditions
01: According to setting in DM 6646, DM 6651
Default: Host link using standard parameters
Note: A 1:1 NT Link cannot be used with the RS-232C port
on the CQM1-CPU21-E or
p
eri
p
heral
p
ort.
15 0
Bit
0 0
Node number
(2 digits BCD): 00 to 31
Default: 00
DM 6648: RS-232C port
DM 6653: Peripheral port

Omron CPM1 Specifications

General

Model	CPM1
Manufacturer	Omron
Instruction Set	Basic and advanced instructions
Power Supply	100 to 240 VAC or 24 VDC
Communication	RS-232C
I/O Points	10, 20, 30, or 40 points depending on the model
Timers	Yes, multiple timers available
Counters	Yes, multiple counters available
Input Voltage	24V DC
Output Type	Relay or transistor
Number of I/O Points	10, 20, 30, 40
Communication Ports	RS-232C (optional)
Operating Temperature	0°C to 55°C
Storage Temperature	-20°C
Humidity	10% to 90% (non-condensing)
Dimensions	Varies depending on the model
Weight	Varies depending on the model
Program Memory	2048 steps (2K steps)