Honeywell HC900 - Serial Ports (RS-232 and RS-485 for legacy systems and two RS-485 ports for new systems)

Design and Implementation of HC900 Control System - Allowable Function Blocks for Process and Safety Functions
Revision 1.9 HC900 Process & Safety Controller Safety Manual 39
01/14
XYR 5000 Base
Station
This block allows the HC900 controller to act as a
Modbus master device and communicate with
XYR5000 base radios via the serial port of the
controller. Configuration of the HC900 master
requires one block per base radio, up to 32 base
radios or 1024 parameters maximum. Only one block
may be assigned to each XYR5000 base radio slave
device. The block supports 10 read parameters from
the XYR5000 plus it provides digital indication of
communication integrity. For attached transmitters
there is a separate 5XYRT block which is connected
to 5XYRB via the address (ADDR) output of the
5XYRB block. Since all the parameters of 5XYRB
block have fixed Modbus register addresses, there is
no configuration data associated with addressing of
the parameters. All outputs can be tagged in the
same manner to any other function block output.
NOTE 1: To read proper values of all transmitter
parameters when connecting an HC900 to the
XYR5000 system, the XYR5000 base radio must be
set to "Register Mapping Mode." If a XYR5000 base
radio slave device does not respond to a request, the
last output value will be maintained. NOTE 2: The
output values of the 5XYRB block may be added to
the Custom Modbus Map without the need to assign
tags to the output pins. NOTE 3: In the serial port
configuration, set the Baud rate to Match Base Radio,
Parity to NONE or EVEN (default), and Stop Bit to 1.
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XYR 5000
Transmitter
This communication function block expands the read
capability of the 5XYRB Slave function block to
access parameters of XYR5000 Transmitters. 5XYRB
block’s ADDR output is connected to the ADDR input
of this block to access all the parameters. The 5XYRT
block has 12 output parameters which are supplied
by 5XYRB block. Since these parameters have fixed
Modbus register addresses, there is no configuration
data associated with this block. All outputs can be
connected or tagged in the same manner as any
other function block output. If communication
between the HC900 and the XYR5000 base radio is
lost, the last read values will be supplied on the
5XYRT outputs.
X