User`s manual

291
CHAPTER 11 DATA COMMUNICATIONS USING USER FRAMES
11
11.4 Data Transmission
(b) Transmission user frame designation
The following explains application of the buffer memory to be used when sending data using user frames,
along with the designated and stored values.
• User frame being transmitted storage area (addresses: B6H/156H)
What number of the transmission frame number designation area is being sent is stored in the data
transmission via user frames.
• CR/LF output designation area (addresses: B7H/157H)
When sending a user frame or arbitrary data that does not contain a CR/LF, designate whether a CR+LF will be
sent each time a user frame or arbitrary data is sent.
• Output head pointer designation area (addresses: B8H /158H)
Write the head position (th number) in the transmission frame No. designation area for writing the registration
number of the user frame to be sent.
Remark
Transmission using a user frame cannot be performed when the value of the output head pointer designation area is "0".
B6H
156H
b15 b0
0H to 64H
0H to 64H
to
: Not sent
: User frame being transmitted designation No. (nth number)
(CH1 side)Buffer memory address
(CH2 side)
0H( 0)
1H to 64H( 1 to 100)
B7H
157H
b15 b0
0 to 1
to
0: Do not send
1: Send
0 to 1
(CH1 side)Buffer memory address
(CH2 side)
0
1
100
B8H
158H
b15 b0
0 to 100
to
: No designation
: Send from the first
: Send from the 100th
0 to 100
to
(CH1 side)Buffer memory address
(CH2 side)
to