4-4
Section
SRM1(-V2) Communications Functions
279
Cable Connections
Refer to the
SRM1 Master Control Units Operation Manual
for information on
cable connections in a 1:N NT Link.
PC Setup Settings
When the RS-232C port is used for a 1:N NT Link, make the following PC Setup
settings from a Programming Device.
Word
Bit
Function
Setting
DM 6645
00 to 03
Port settings
1
00: Standard (1 start bit, 7-bit data, 2 stop bits, even parity, 9,600 bps)
01: Settings in DM 6646
00 or 01
04 to 07
CTS control settings
0: Disable
1: Set
0 or 1
08 to 11
When using a 1:1 PC link: Sets the link words for 1:1 PC Link.
0: LR 00 to LR 15
Not 0: Disable
When using a 1:N NT Link: Sets the maximum PT node number.
1 to 7
The 1:N NT Link is supported by SRM1-C02-V2 only.
1 to 7
12 to 15
Communications mode
1
0: Host Link; 1: No-protocol; 2: 1:1 PC Link Slave; 3: 1:1 PC Link Master; 4: 1:1 NT
Link; 5: 1:N NT Link
The 1:N NT Link is supported by SRM1-C02-V2 only.
5
Note
1. If an improper setting is used, a non-fatal error will occur, AR 1302 will be
turned ON, and the default setting (0 or 00) will be used.
2. For information on 1:N NT Link settings for OMRON PTs, refer to the PT’s
Operation Manual.
3. If an out-of-range value is set, the following communications conditions will
result. In that case, reset the value so that it is within the permissible range.
Communications mode:
Host Link
Communications format:
Standard settings
(1 start bit, 7-bit data; 2 stop bits, even parity,
9,600 bps)
Transmission delay:
No
Node number:
00
4-4-5 One-to-one PC Link Communications
In a 1:1 PC Link, an SRM1 is linked to another SRM1, CPM1, CPM1A, CPM2A,
CPM2C, CQM1, C200HS, or C200HX/HG/HE PC through a standard RS-232C
cable. One of the PCs will serve as the master and the other as the slave. The 1:1
PC Link can connect up to 256 bits (LR 0000 to LR 1515) in the two PCs.
The following diagram shows a 1:1 PC Link between two SRM1(-V2)s.
SRM1
SRM1
RS-232C Port
RS-232C Port
One-to-one SRM1(-V2)
PC Links