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Set Vertical Format Summary
Set vertical format defines the page length. The position
must be between 1 and 255 depending on the form
size. If
W
is not specified, the page length defaults to
1 line.
Input Hex Data Stream
5256 Resu Its
SCS
SVF
Count
MPL
MPL
Error
Code
NN
W
(Decimal)
Status
2BC2
00
• Invalid SCS parameter
2BC2
01
•
2BC2
02
00
•
2BC2
02
1 - FF
VV
•
2BC2
03- FF
• Invalid SCS parameter
Interface
The following illustration shows action and
synchronization between a printer and the controller. All
exchanges are started from the controller by a
command. The flow is in 1 direction at a time. The
arrow indicates the exchange on one 16-bit frame in the
indicated direction.
Poll for Status
Controller
Poll Response Frame 11
. .
Poll Response Frame 2
•
Printer
A poll sequence is always started by the controller.
• Two bytes of status information about the printer
adapter, cable adapter, commands, and parameters
are returned to the controller. (Before a 'set mode'
command is received after a power on reset, only poll
response frame 1 is returned.)
Write Data
Controller
Poll Response Frames 1 and
21
•
I
I
I
Poll
2
Printer
Poll Response Frames 1 and 2
with
'not busy' and 'no-exception' bits active
Active Write
Data
• A write operation is initiated by the ·controller.
• The printer receives a poll frame and responds with
busy status. At this time, the printer is preparing for
the write operation.
• The controller continues to poll until the printer
responds with a not-busy status with no-exception
status.
The controller issues an 'activate write' command to
start the write operation ..
• The controller shifts the data onto the cable to the
printer.
IThe frame contains synchronization bits and instructions
to switch the printer or controller to receive mode (line
turnaround).
2The frame contains an end of message, a station address of
all ones
(111).
Theory,
Features
Theory
5256
MIM
4-13
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