50
Communications Functions
Section 1-6
Transmission Frame Format
Baud Rate
Transmission Delay Time
(DM 6647 and DM 6652)
Depending on the devices connected to the communications port, it may be
necessary to allow time for transmission. When that is the case, set the trans-
mission delay to regulate the amount of time allowed.
The transmission delay is set in the PC Setup to create a minimum interval
between sending data from the PC. The transmission delay is used for the fol-
lowing serial communications modes.
The delay is not used the first time data is sent from the PC. The delay will
affect other sends only if the normal time for the send comes before the time
set for the transmission delay has expired.
If the delay time has already expired when the next send is ready, the data will
be spent immediately. If the delay time has not expired, the send will be
delayed until the time set for the transmission delay has expired.
Setting
Stop bits
Data length
Stop bits
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
Setting
Baud rate
00
1,200 bps
01
2,400 bps
02
4,800 bps
03
9,600 bps
04
19,200 bps
Serial communications
mode
Application
Host Link, responses
Once the PC has sent a response to the host com-
puter, it will not send the next response until the time
set for the transmission delay has expired.
Host Link, PC-initiated com-
munications
Once the PC has sent data using TXD(48), it will not
send data again until the time set for the transmission
delay has expired.
No-protocol communications
15
0
Bit
Transmission delay (4 digits BCD; unit: 10 ms)
Default:
No delay
DM 6647: RS-232C port
DM 6652: Peripheral port
