Operating instructions

PTQ-MCM ♦ Quantum / Unity Platform Reference
Modbus Communication Module
Page 98 of 139 ProSoft Technology, Inc.
April 29, 2008
8.1.3 Hardware Specifications
Specification Value
Backplane Current Load 800 mA @ 5 V
Operating Temperature 0 to 60°C (32 to 140°F)
Storage Temperature -40 to 85°C (-40 to 185°F)
Relative Humidity 5% to 95% (non-condensing)
Vibration Sine vibration 4-100 Hz in each of the 3 orthogonal axes
Shock 30G, 11 mSec. in each of the 3 orthogonal axes
LED Indicators
Module Status
Backplane Transfer Status
Serial Port Activity LED
Serial Activity and Error LED Status
Configuration Serial Port (PRT1)
DB-9M PC Compatible
RS-232 only
No hardware handshaking
Application Serial Ports
(PRT2, PRT3)
DB-9M PC Compatible
RS-232/422/485 jumper selectable
RS-422/485 screw termination included
RS-232 handshaking configurable
500V Optical isolation from backplane
8.1.4 Functional Specifications
 Support for the storage and transfer of up to 5000 registers to/from the
Quantum processor's data files
 User-definable module memory usage
 Two ports to emulate any combination of Modbus master or slave device
 Supports Enron version of Modbus protocol for floating point data
transactions
Configurable parameters include:
Parameter Description
Protocol RTU or ASCII
Baud Rate 110 to 115,200
Parity None, Odd and Even
Data Bits 5 to 8
Stop Bits 1 or 2
RTS On and Off Timing 0 to 65535 milliseconds
Minimum Response Delay 0 to 65535 milliseconds
Use of CTS Modem Line Yes or No
Floating-Point Support
Slave Specifications
The PTQ-MCM module accepts Modbus function code commands of 1, 2, 3, 4, 5,
6, 8, 15, 16, 17, 22 and 23 from an attached Modbus Master unit. A port
configured as a Modbus slave permits a remote master to interact with all data
contained in the module. This data can be derived from other Modbus slave
devices on the network, through a master port, or from the Quantum processor.