AERCO C-More Controls Manual June 2010 - Manual (Page 139)

C-More Controller for Benchmark, Innovation & KC
USER MANUAL
04/22/14 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 Page 139 of 162
OMM-0032_0E Phone: 800-526-0288 GF-112
APPENDIX A: ProtoNode SSD Setup for BST and HST
Applications
This appendix applies to ProtoNode SSD Setup for BST and HST applications requiring Building
Automation System Access.
Description
The AERCO SSD (Slave Slave Device) is a one-of-a-kind gateway developed by AERCO to
enable two (2) Modbus masters to communicate. Use the SSD to enable a Building Automation
System Modbus masters to bi-directionally communicate to BST/HST Modbus masters.
Main Features
The AERCO SSD device is unique because it enables two (2) Modbus masters to bi-
directionally communicate over RS-485. The AERCO SSD device is also specifically designed
to support the BST/HST Automatic failover Feature. While the BST/HST role can be transferred
to another unit (with a different Modbus address) the SSD device operates at a fixed and
constant Modbus address. The fixed SSD address is propagated to each unit and allows the
BST/HST master to resume communications after a failover without BAS changes.
AERCO SSD Setup
Please follow all of the (ProtoNode) setup instructions included in document GF-129 with the
exceptions as noted here.
SSD Wiring Setup
The SSD is wired to the “end” unit on the Modbus RS-485 bus. The location should be chosen
to reduce cable length and limit EMI noise.
SSD Configuration File Setup
The SSD must be loaded with the appropriate bin file (profile) below. The instructions for
selecting the bin file (profiles) are in Section 2 of the ProtoNode Gateway User Manual, GF-129:
• See Table 2-4 for RER
• See Table 2-5 for LER
C-More Configuration Settings for SSD
To setup and enable SSD communications, make the following changes to the C-More
configuration:
1) In the BST menu, set SSD Modbus Address to a number greater than the maximum
unit address. It is recommended to use the address 247 for standardization proposes.
2) In the BST menu, verify the SSD Poll Timer is at the default value of 0.