)
All screen data stored in the PT is transferred to the host computer.
(1) [ESC] x
(2) [ESC] s
[ESC] r (3)
[ESC] z (4)
(5) [ESC] }
(7) [ESC] y
[ESC] y (6)
Host computer PT receives
Start Transfer command
Screen# Specify Transfer
command
Receive
Receive
End Transfer command
Acknowledged command
Receive
Receive
Receive
Receive
Transfer Data command
Transfer screen # response
command
Transfer started notification
Multiple transfers if the length of screen
data transferred exceeds 124 bytes.
Repeat (3) and (4) for the number of
screens
Received normally response
Transfer ended notification
Respond with transferred screen#
Receive
End Transfer command
Specify all screen transfer
All screen transfer complete notification
Character-string memory table data and the numeral table data is batch trans-
ferred from the host computer to the PT.
Transfer Data command
[ESC] x
[ESC] t
[ESC] z
[ESC] }
[ESC] y
Host computer PT receives
Start Transfer command
Receive
End Transfer command
Receive
Receive
Receive
Receive
Non-Screen Data Specify
Transfer command
Acknowledged command
Transfer started notification
Memory table specification
Multiple transfers if the length of screen
data transferred exceeds 124 bytes.
Received normally response
Transfer ended notification
Transfers the screen data one screen at a time in the order they were displayed
on the PT.
Display History (by Sequence)
Data Transfer Command
Receive
[ESC] x
[ESC] u
[ESC] t
[ESC] z
[ESC] y
[ESC] y
Host computer PT receives
Start Transfer command
End Transfer command
Receive
Receive
Receive
Non-Screen Data Specify
Transfer command
Transfer started notification
Transfer ended notification
Receive
Receive
Non-Screen Data Specify
Transfer command
End Transfer command
Display history (by sequence)
specification
Display history (by sequence) transfer
response
Display history data transfer (by sequence)
(one command per data item)
All data transfer complete notification
History data can also be transferred in order of frequency from the host comput-
er to the PT using the same procedure.
Checksum Using the Online Transfer Command
The checksum (2-digit hexadecimal) ensures that command communication is
normalwhenusingonlinetransfer.Thetransmittingstationsetsthechecksumin
a command and transmits it to the receiving station which confirms that the
checksum is correct.
If the received checksum does not match the actual checksum, the receiving
station returns a Not-Acknowledged Command (see page 53) to inform the
transmitting station that a checksum error occurred.
All Screen Data (PT
→
Host
Computer)
Memory Table Data (Host
Computer
→
PT)
Display History Data (By
Sequence) (PT
→
Host
Computer)
"! #
Section 4-3
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