Honeywell HA71, Technical Manual

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HA71 Digital Gas Controller
Revision 3 (04/08)
HA71 Technical Manual 5-2
5.0 Modbus ® RS-485 Ports
The HA71 is equipped with Master (COMM 1), and Slave (COMM 2), Modbus ® RTU ports. Port configurations are described in Sections 2.2
and 2.3 of this manual. This section defines register locations of data available via the HA71 slave port.
5.1 Modbus
®
Slave Register Locations
The following table describes the HA71’s Modbus
®
slave database. Any portion of this data may be read by a Modbus
®
master device such
as a PC, PLC or DCS. Since the Modbus
®
port is RS-485, many HA71’s may be multi-dropped onto the same cable.
Memory Integer ASCII:
Notes:
ASCII may be read 2 characters at a time or in strings using a multiple register read.
Sixteen character channel tag name:
Type Channel First Last Read FC Write FC Notes
Channel Tag 1 40401 40408 3 n/a 2 Characters per Register
Channel Tag 2 40409 40416 3 n/a 2 Characters per Register
Channel Tag 3 40417 40424 3 n/a 2 Characters per Register
Channel Tag 4 40425 40432 3 n/a 2 Characters per Register
Channel Tag 5 40433 40440 3 n/a 2 Characters per Register
Channel Tag 6 40441 40448 3 n/a 2 Characters per Register
Channel Tag 7 40449 40456 3 n/a 2 Characters per Register
Channel Tag 8 40457 40464 3 n/a 2 Characters per Register
Channel Tag 9 40465 40472 3 n/a 2 Characters per Register
Channel Tag 10 40473 40480 3 n/a 2 Characters per Register
Channel Tag 11 40481 40488 3 n/a 2 Characters per Register
Channel Tag 12 40489 40496 3 n/a 2 Characters per Register
Channel Tag 13 40497 40504 3 n/a 2 Characters per Register
Channel Tag 14 40505 40512 3 n/a 2 Characters per Register
Channel Tag 15 40513 40520 3 n/a 2 Characters per Register
Channel Tag 16 40521 40528 3 n/a 2 Characters per Register