POSIFLEX Business Machines PP3000 - Manual (Page 31)

Note: The addressable mode is valid only when an optional RS-422A serial
interface is mounted.
a) When DIP SW4-1 through 4-4 are all ON (DC1/DC3 invalid mode)
DC1 and DC3 codes are invalid.
b) When DIP SW4-1 through 4-4 are OFF (DC1/DC3 valid mode)
DC1: Select
DC3: Deselect
When the printer receives the DC3 code, it throws away data until it
receives the DC1 code. (all the data between the DC3 and DC1 code)
DTR is always ready.
c) Other settings (addressable mode)
DC1 n: selects n (address)
DC3: Deselect
When the printer receives the DC3 code, it throws away data until it
receives the DC1 n code (with the n matching the printer’s own address).
DTR is always ready.
Note : DIP sw1-4 select the select/deselect state for the printer when the power
is first switched on.
Parallel Interface Switch
DIP-SW1
Switch
Function ON OFF
1-1
1-2 Not used
1-3 Control code CR Invalid Valid
1-4 Not used
1-5 Setting the paper feed length 1/6 - inch 1/8 - inch
1-6 Setting the buffer size 4 K-bytes 256 bytes
1-7 Not used
1-8 Paper out detection function Valid Invalid
PP3000 Series User’s Manual 4 - 7