Carrier WSHP Open v3 Integration Manual

Also see for WSHP Open v3: Integration guide

WSHP Open v3 35Date: 06/30/2008Vendor Name: CarrierProduct Names: WSHP OpenProduct Model Number: Water Source Heat PumpProtocol Description:N2 is not a standard protocol, but one that was created by Johnson Controls, Inc. that has been made open andavailable to the public. The speed of N2 network is limited to only 9600 baud. The N2 slave address can be setfrom 01 to 99.Product Description:The WSHP Open is a factory-installed water source heat pump controller that is capable of speaking multipleprotocols. The WSHP Open controller speaks the Johnson N2 Open Protocol as described in the Metasys N2System Protocol Specification (for Vendors) document, revision 6/13/96. Further details on the N2 supportedimplementation are described below.Communication Types: Baudrates: Data Bits: Parity: Stop Bits:2-wire EIA-485 9600 8 None 1Network Point Types:Analog Inputs (AI)Binary Inputs (BI)Analog Outputs (AO)Binary Outputs (BO)Internal Floats (ADF)Internal Integers (ADI)Internal Bytes (BD)Protocol Commands:Identify Device TypeSync TimePoll Without AcknowledgePoll With AcknowledgeRead Analog InputRead Binary InputRead Analog OutputRead Binary OutputRead Internal ParameterWrite Analog InputWrite Binary InputAppendix D: Johnson Controls N2 Protocol Implementation ConformanceStatement