TallyGenicom T6200 Series, Operator'S Manual

Page: 66 / 92

Operator Manual
3–30
Status Enquiry
When this option is enabled, the host may send an enquiry packet to the
printer requesting status. The printer will then send back a 1 byte packet
denoting the status of the printer. If this option is set to OFF (the default), no
packet will be sent back. The Status Enquiry feature may be enabled in con-
junction with any other protocol. When enabled and the host sends an ENQ
character, the printer responds by sending a printer status byte. The status
byte is designed to be a printable code and is the only printable code the
printer can transmit.
The bit pattern is as follows:
Bit Meaning/Value
7 Parity if 7 bit data and parity enabled (MSB)
6 Always a 1
5 1 if Data Overrun
4 Always a 0
3 1 if Parity Error
2 1 if Paper System Error or Platen Open
1 1 if Offline
0 1 if Busy (fault or buffer full) (LSB)
The Status Enquiry Feature is slightly different when the current emulation is
the HP2564C. Instead of responding to the ENQ character, the printer will
respond to the ESC ? DC1 sequence. The bit pattern of the status response is
as follows:
Bit Meaning/Value
7 Parity if 7 bit data and parity enabled (MSB)
6 Always a 0
5 Always a 1
4 Always a 1
3 0 if Parity Error, Data Overrun, or Buffer Overflow
2 1 if Offline
1 1 if Busy (fault or buffer full)
0 1 if Paper System Error or Platen Open (LSB)