Honeywell HA71, Technical Manual

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HA71 Digital Gas Controller
Revision 3 (04/08)
HA71 Technical Manual 3-9
3.1.7 Optional Clock/Printer Interface Board
When equipped with the Clock / Printer Interface option, shown in
Figure 3-8, the HA71 Controller is capable of automatically printing time
& date stamped alarm events to a 24 PIN dot matrix printer such as
the Panasonic KX-P1131. The cable interface between the HA71 and
the KX-P1131 may be either parallel or serial. Parallel interfaces only
allow 6 feet of separation while the RS-232 serial interface allows up to
50 feet. Distances up to 4000 feet may be obtained using the 10-0229
printer interface option’s RS-422 port but requires an additional tri-port
RS-422 / RS-232 converter at the printer end of the cable.
The 10-0229 Printer Interface may also be connected to a PC running
HyperTerminal or other communications software as an alternative to
hard copy printing of the data. Printer/PC cable schematics are shown
in Figure 3-7. Printer settings for serial interfaces are 9600 baud, 8
data bits, no parity and one stop bit. Communications software settings
are 9600 baud, 8 data bits, no parity, one stop bit and FlowControl
= Hardware. Printer diagnostic red LED’s indicate printer faults such
as out of paper, overflowed buffer or loss of communications. Green
LED’s flicker to confirm good communications between the HA71 and
printer during print attempts.
Examples of printed alarm events are shown below. The format of each
event, from left to right, is DATE, TIME, 16 character ASCII channel
ID from the HA71, HA71 channel #, alarm #, IN or OUT status. A
buffer in the HA71 retains the most recent 30 – 35 printed events.
It is possible to dump the entire buffer to the printer from the menu
shown in
Figure 3-9 . This is useful if printer problems have occurred
causing missed printouts.
05/22/03 08:21:00 Storage Tank 103 Chnl 1 Alarm 2 IN
05/22/03 08:21:01 Storage Tank 103 Chnl 1 Alarm 2 OUT
05/22/03 09:12:01 Storage Tank 103 Chnl 13 Alarm 1 IN
05/22/03 09:13:00 Fuel A Flow Chnl 9 Alarm 1 IN
05/22/03 09:13:05 Storage Tank 103 Chnl 1 FAULT IN
05/22/03 09:13:05 Fuel Dock Chnl 2 FAULT IN
05/22/03 09:40:10 Storage Tank 103 Chnl 13 Alarm 2 IN
05/22/03 09:40:14 Fuel Dock Chnl 2 FAULT OUT
05/22/03 09:40:14 Trans Pump 103 Chnl 3 FAULT OUT
05/22/03 09:40:14 Storage Tank 103 Chnl 1 FAULT OUT
05/22/03 11:53:37 Fuel A Flow Chnl 9 Alarm 1 OUT
Figure 3-8. Printer Interface Option 10-0229