Dascom T2250 User Guide IGP for Dot Matrix Printers - Manual (Page 40)

IGP for Dot Matrix Printers User Guide
40
VFU Channel Commands
After the VFU Memory is loaded, the format is set. To use the VFU Format, you must select VFU
Mode on the printer. After selecting VFU Mode, you can send VFU Channel Commands to move
the paper either forward or backward to the desired location. All reverse moves stop at the TOF if
the requested channel is not found. The escape sequence for moving the paper to a desired
channel is:
ESC [ c nn ! p
1B 5B 63 21 70
Where:
c = Paper motion direction.
0 = forward paper motion.
9 = reverse paper motion.
nn = VFU channel to which the paper will move. The value for each
channel is shown below:
Channel ASCII HEX
1 00 3030
2 01 3031
3 02 3032
4 03 3033
5 04 3034
6 05 3035
7 06 3036
8 07 3037
9 08 3038
10 09 3039
11 10 3130
12 11 3131
Figure 11 – VFU Channel Values
The following examples give the format for forward and backward moves.
Example 1:
To move the paper forward (c = 0) to channel 4 (nn = 03), the escape sequence is:
ESC [ 0 0 3 ! p
1B 5B 30 30 33 21 70
Example 2:
To move the paper backward (c = 9) to channel 1 (nn = 00), the escape sequence is:
ESC [ 9 0 0 ! p
1B 5B 39 30 30 21 70