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4-3
Section
CPM2A/CPM2C Communications Functions
247
Word
Setting
Function
Bit
DM 6649
00 to 07
Start code (01 to FF)
(No-protocol, effective when bits 8 to 11 of DM 6648 are set to 1.)
Any
00 to 15
No. of bytes of data received
(No-protocol, effective when bits 12 to 15 of DM 6648 are set to 0.)
00: 256 bytes
01 to FF: 1 to 255 bytes
Any
End code (00 to FF)
(No-protocol, effective when bits 12 to 15 of DM 6648 are set to 1.)
Settings for Peripheral Port
Word
Bit
Function
Setting
DM 6650
00 to 03
Port settings
0: Standard (1 start bit, 7-bit data, 2 stop bits, even parity, 9,600 bps; Host
Link unit number: 0)
1: Settings in DM 6651
(Other settings will cause a non-fatal error, the default setting (0) will be
used, and AR 1302 will turn ON.)
Match host
parameters
04 to 11
Not used
0
12 to 15
Communications mode
0: Host Link or peripheral bus; 1: No-protocol
(Other settings will cause a non-fatal error, the Host Link setting (0) will be
used, and AR 1302 will turn ON.)
0
DM 6651
00 to 07
Baud rate
00: 1,200 bps, 01: 2,400 bps, 02: 4,800 bps, 03: 9,600 bps, 04: 19,200 bps
Match host
parameters
08 to 15
Frame format
Start
Length Stop Parity
00:
1
7
1
Even
01:
1
7
1
Odd
02:
1
7
1
None
03:
1
7
2
Even
04:
1
7
2
Odd
05:
1
7
2
None
06:
1
8
1
Even
07:
1
8
1
Odd
08:
1
8
1
None
09:
1
8
2
Even
10:
1
8
2
Odd
11:
1
8
2
None
(Other settings will cause a non-fatal error, the default settings (03) will be
used, and AR 1302 will turn ON.)
DM 6652
00 to 15
Transmission delay (Host Link)
0000 to 9999 (BCD): Set in units of 10 ms.
(Other settings will cause a non-fatal error, the default setting (0000) will be
used, and AR 1302 will turn ON.)
0000 to 9999
Note
1. If SW1 on the front panel of the CPU Unit is ON, the peripheral port will oper-
ate with the default settings regardless of the settings in DM 6645 to
DM 6649.
2. When connecting a computer running Support Software via the peripheral
bus, turn OFF SW1 on the front panel of the CPU Unit and set DM 6650 to
0001 (Host Link). The CPU Unit will automatically switch to peripheral bus
communications for the serial communications port.