HONEYWELL HC900 Hybrid Communications Users Guide

HONEYWELL HC900 Hybrid Communications Users Guide

DESCRIPTION

The HC900 controller provides Modbus communication support on three communication interfaces.  

• Network port: Modbus TCP on an Ethernet connection  

• Serial Port S1 RS232/RS485 selectable port. (Default RS232.): Modbus RTU  

• Serial Port S2 RS232/RS485 selectable port. (Default RS485.): Modbus RTU

View or print addresses  

You can print out the Modbus addresses of various parameters of the configuration (signal tags, PID loops,  SP programmer, etc.) using the HC Designer report functions. With HC Designer Ver. 2.1 and later, these  reports may also be exported to .csv files for view/manipulation in a spreadsheet and possible import to  other HMI applications.

ATTENTION  

To access the controller you must have a current Hybrid Control Designer configuration file available. Some  data is referenced relative to number, such as Signal Tags and Variables.  

Other principal blocks, such as PID blocks, have offsets for parameter access dependent on the order in  which the blocks were placed on the Function Block Diagram.  

It is strongly recommended that you upload the controller configuration using the Hybrid Control  Designer configuration tool to assure that you have a current configuration. The Hybrid Control Designer tool provides a series of reports for use in Modbus Address identification.  The "Tag Information" report lists the variables and Signal Tags in numeric order along with their Modbus  Addresses.  

A "Block Modbus Address" report lists the starting addresses for all principal blocks configured, identifying  the offset.

Modbus/TCP Protocol  

Modbus/TCP protocol, developed by Groupe Schneider’s Modicon Division, is a popular, open standard for data  interchange over Ethernet TCP/IP networks using a Modbus RTU command structure.  

It is simply an encapsulation of Modicon’s Modbus RTU protocol within a TCP/IP frame as shown below, which  includes header information and the Modbus frame.

HC900 Ethernet Communications Setup  

See the HC900 Hybrid Control (HC) Designer Users Guide, Doc. # 51-52-25-110 or respective HC Designer Help  Files for setting up the following network parameters:  

IP Address, Subnet Mask (optional), Default Gateway IP Address (optional)  

1. Be sure the PC, HMI panel, or other Host device has a Network Interface Card (NIC) with an IP  address (fixed or DHCP served) that allows access to controllers on the same or other subnet. Consult  your IT department or network administrator for allocating IP addresses to the controllers as required.  

2. You will need to set each controller’s IP address prior to network connection since every HC900  controller is shipped with the default IP address of 192.168.1.254. Placing multiple controllers on the  same network before they have been given unique IP addresses will cause problems.  

3. On the PC, use the Utilities Worksheet in the HC Designer software to set up the serial RS-232  connection to the controller at the desired baud rate. This will require a null modem cable.  

4. Select the Set Controller’s Network Parameters button. Using the wizard (bottom radio button), select  the PC COM port to be used, then set the controller’s new network parameters including IP address,  Subnet Mask (if other than default, 255.255.255.0), and Default Gateway IP address (if required,  otherwise leave at default 0.0.0.0). See your IT network administrator for proper entries. (Refer to  the on-line help provided with the HC Designer software, Utilities Worksheet, Set Controller’s  Network Parameters, for further details on this step).