
B.1 Parallel Interface
| Pin | In or | Signal | Description | 
| 
 | out | 
 | 
 | 
28— Ground return
29— Ground return
30— Ground return
| 31 | In | — [nInit] | Ignored | 
| 
 | 
 | 
 | 
 | 
| 32 | Out | Error† [nFault] | When the  | 
| 
 | 
 | 
 | FRPO O2, 2; EXIT;), 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. | 
| 
 | 
 | 
 | 
 | 
Table B-1 
†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.
