Olivetti PR 4 Programmer's Manual page 53

ESC = n
Select peripheral device
Hexadecimal code: 1B 3D n
n = 0-255
Range:
Selects device to which host computer sends data, using n as follows:
Bit Off/On Hex
0 Off 00
On 01
1 Off 00
On 02
2-7 - -
- When the printer is disabled, it ignores all data except for error-recovery commands (DLE
Notes:
ENQ 1, DLE ENQ 2) until it is enabled by this command.
- Even if the printer is disabled, it may go off-line due to manual printer operation.
Default
- When turning on the printer:
- n = 2, if the customer display is enabled via setup (DISPLAY: ENABLE)
- n = 1, if the customer display is disabled via setup (DISPLAY: DISABLE)
-
When executing ESC @, default values of the parameter n change as follows, depending
on the value set by ESC = just before processing ESC @ and on the setup:
- if n was 1, remains unchanged
- if n was 2, remains unchanged
- if n was 3, then n: becomes 2 when the customer display is enabled via setup
Epson TM-U950 Commands
Decimal Function
0 Printer disabled.
1 Printer enabled.
0 Customer display disabled.
2 Customer display enabled.
- Undefined.
becomes 1 when the customer display is disabled via setup.
4-17