Honeywell 800 Air Conditioner User Manual


 
HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD
15 66-2069—02
using key sequence below at the front panel of the
700 as follows:
1. Press and hold BNR-OFF SEQ START/END
button for 2 seconds.
2. Press up arrow to change setting from P0 to P1.
3. Press STORE.
The factory default Modbus address of the 700ACSP and
700DCSP is 0 and must be changed to a number between 1
and 32 to establish communication between the signal
processor and the host control. When more than one signal
processor is in the network, ensure that each signal processor
has a unique Modbus address within the range of 1 to 32.
Modbus RTU Function Supported
Four Modbus functions are supported:
01 Output coil read
03 Holding register read
06 Preset single holding register
16 Preset multiple holding register
NOTES:
Before Model 700 signal processors are
connected to the RS-422 bus, their individual
Modbus addresses must be set to differing values
between 1 and 32.
The RESET button on front of the 700ACSP or
700DCSP signal processors is used to set the
Modbus address.
Press and hold the RESET button for two
seconds and the current address will appear. It
may be changed with the up or down arrow keys.
Pressing the STORE button will store the new
address.
Table 4. MODBUS registers map.
Register Name Description Minimum Maximum
40001 FLAMECOUNT Flame count of active viewing head (read only) 0 3425
40002 PROCSTATUS Processor status bitmask (read only)
bit 1: flame on relay status (1=relay energized, 0=off)
bit 2: Processor Lockout status (0 =lockout, 1=not lockout)
bit 3: Panel access disabled (1=disabled, 0=enabled)
bit 4: 4 - 20 ma output (0=0 to 20, 1=4 to 20)
0255
40003 FLAMEON Flame On setpoint (read/write) 3 (S70X) 29
40007 OUTPUTGAIN Gain of the 0/4-20mA output (read/write) 20 80
40010 IRGAIN IR sensor gain setting (read/write) 1 9
40012 UVTGAIN UV tube gain setting (read/write) 1 9
40017 TYPE Viewing head type bitmask (read only)
bit 0: UV viewing head
bit 1: IR viewing head
--
40021 TIMEDELAY Time Delay (read only)
=1 for 700XXSP
12
40022 FFRT Flame failure response time setting in seconds (read/write) 1 3
40023 VERSION Firmware version (read only) - -
40024 MODEL Model number (read only) - -
40084 ERRORCODE Error code (read/write)
NOTE: writing a non zero number to this register is not allowed
--
40085 BAUD Baud rate setting (bits/second). Only affects RS-485
communication, not IRDA. (read, write)
96=9600 (default), 192=19200.
The SP and the master device must have the same baud
settings.
96 192
40086 PARITY Parity setting. Only affects RS-485 communication, not IRDA.
(read/write)
0= none (default), 1=odd
01
40087 ADDRESS Modbus address used by RS-485 and IRDA (read/write).
Each device must have a unique address.
0247
40089 PROTOCOL Protocol (read/write)
0=Honeywell protocol, 1=Modbus protocol
01