Operation Manual

Computer Interface
4-4 ADVANCED OPERATION GUIDE
10 Out Acknowledge
†
[nAck] This negative-going pulse acknowledges the previous
character received.
11 Out Busy [Busy] When this signal is high, the printer is busy. When it is low,
the printer is able to receive more data.
12 Out Paper Empty
[PError]
This signal goes high when the printer runs out of paper.
††
13 Out Online (Select) [Select] This signal goes high when the printer is online and low
when the printer is offline. The signal goes low when you
press [GO] to make the printer go off line.
††
14 In — [nAutoFd] Ignored
15 — — Not used
16 —0 V DC
17 — Chassis Ground
18 — +5 V DC This pin is used for the printer’s +5 V DC power supply
(+5±0.5 V, 400 mA maximum, with fuse)
19 — Ground return
20 — Ground return
21 — Ground return
22 — Ground return
23 — Ground return
24 — Ground return
25 — Ground return
26 — Ground return
27 — Ground return
28 — Ground return
29 — Ground return
30 — Ground return
31 In — [nInit] Ignored
32 Out Error
†
[nFault] When the high-speed parallel line control is on, this line
returns an error status.
††
33 — — Not used
34 — — Not used
35 Out Power Ready This signal goes high when the printer is powered on.
36 In Select In [nSelect In] When this line is high, IEEE1284 mode is enabled.
†. Indicates signals that are low active.
††.The Paper Empty, Online, and Error signals work only after you have enabled them using the O2
parameter of the FRPO command.
Pin
In or
out
Signal Description