Citizen CLP-631 - Parallel Port Status Signals When an Error Occurs

2-4. Interface
(3) Parallel port status signals when an error occurs
T he following table shows the status signal change when an error occurs.
Error Compatible mode
Paper end Busy:
PError:
Select:
Fault:
L
→ H
L
→ H
H
→ L
H → L
Error other than paper end
• Head open
• Other
Busy:
PError:
Select:
Fault:
L
→ H
L
→ unchanged
H → L
H
→ L
Conditions for Busy • Receive buffer full
• Data being read
• Error
(4) Compatible timing specification
[When power is on] (Timing to go on-line)
BUSY
SELECT
Power On
ACK
Reset
CLP-621 & CLP-631 2-52