SPX HANKISON HES Series, Instruction Manual

Page: 8 / 28

8
I. Using the RS-232 port
The RS-232 port is used to monitor dryer operation from
a host computer. A (1 to 1) DB-9 cable is required to
connect dryer and computer. For PC connections, data
is transmitted on pin 2, received on pin 3, ground is pin
5, pins 7 and 8 are jumpered at dryer.
Operation is at fixed baud rate of 9,600; asynchronous
format is 8 bit, no parity, 1 stop bit (“8,N,1”). No check
sum or error correction values are provided. If required,
request status string two (or more) times and compare
for agreement.
Request data by sending ASCII ? character (3FH).
Response may take up to two seconds as certain
processing functions may require completion before
serial port is acknowledged.
Dryer responds with line feed (0AH), carriage return (0DH),
and character string: (1), (2), (3), (4), (5), (6), (7), (8), (9)
(1) = STX (start-of-text character, may appear as a smi-
ley face or some other character
(2) = 108, Control board ID
(3) = 0 or 1, Compressor running status (0=off, 1=on)
(4) = M or S, Operating Mode (M= MANUAL OVERRIDE, S
= SCHEDULE RUNNING)
(5) = xxxx, HOURS TO SERVICE
(6) = xxxxxx, TOTAL HOURS
(7) = xx, Alarm or Service Code (0=no alarm, 30=LOW
PRESSURE ALARM, 31=HIGH PRESSURE ALARM,
32=COMPRESSOR ALARM, 36=HIGH EVAP TEMP
ALARM, 37=HEATER ALARM, 38=DRAIN ALARM,
39=SERVICE DRYER, 41=TEMP SENSOR ALARM)
(8) = xx.x, Evaporator temperature (°F)
(9) = ETX, (end-of-text character, may appear as a heart
or some other character)