Honeywell Touchpoint 4 User Manual

Touchpoint 4 Serial Communication Protocol Issue 1 09/07
Protocol Command Denition
Handshake command – 0x40
This is used to test for communication between the master and the specified slave.
Command packet to instrument:
  Commandcode: 0x40
Data field: null
Checksum: 1 byte
Example:
Ifthemasterwantstotestthecommunicationwiththeaddressed01instrument,it
should send out:
  0x7f0x010x010x400x3f.
Response packet from instrument:
  Commandcode: 0x40
  ACKcode:  0x01
Checksum: 1 byte
Example:
Theaddressed01instrumentreceivesthehandshakecommandandresponses:
  0x7f0x010x020x400x010x3d.
Get unit and points status - 0x30
This command requests the instrument date, time, alarm status, fault status and up-to-
four channel(s) status.
Command packet to instrument:
  Commandcode: 0x30
Data field: null
Checksum: 1 byte
Example:
  0x7f0x010x010x300x4fmeansthemasterrequeststhestatusofthe
instrument whose address is 1.
Response packet from instrument:
  Commandcode: 0x30
Date field:
Date: 2 bytes
Time: 2 bytes
Unit alarm status: 1 byte
    0x00: noalarm
    0x01: A1alarm
    0x02: A2alarm
    0x03: A1andA2alarm
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Honeywell Touchpoint 4 Specifications

General

Brand	Honeywell
Model	Touchpoint 4
Category	Gas Detectors
Language	English