Overview Of The Temperature Input Units; Temperature Input Units; Comparison With Previous Models With Platinum Resistance Thermometer Inputs - Omron GRT1 - 11-2007 Operation Manual

Overview of the Temperature Input Units

6-1 Overview of the Temperature Input Units
6-1-1

Temperature Input Units

6-1-2 Comparison with Previous Models with Platinum Resistance
Thermometer Inputs
Series
Model
Input type
Maintenance method
Input type setting method
Input type (sensor type)
Input accuracy
Conversion cycle
1/100 display mode
DRT1-compatible 1/100 display mode
Unit power supply
Communications power supply current
consumption
Connections
Allocated I/O data
Node address setting
Baud rate setting
156
This section provides an overview of the Temperature Input Units, including
details on functions and setting methods.
In addition to the functions common to the GRT1 Series (backup, restore,
online conversion, etc.), other functions specific to the Temperature Input
Units (scaling, peak/bottom hold, etc.) are available. The Temperature Input
Units are also able to internally perform math on temperature input values,
which previously required ladder programming in the host PLC. Temperature
data can be selected from the six values obtained from math operations and
allocated as I/O in combination with Status Flags or other status information.
The Setting Tool can be used to allocate this status data, to make settings for
monitoring and specific Temperature Input Unit functions, and to monitor oper-
ation.
GRT1 Series
GRT1-TS2P
Platinum resistance thermometer input
Terminal block and main block can be
separated.
Hardware DIP switch setting, software Setting Tool. Each input bit can be set up
individually when using the Setting Tool.
−
PT100 ( 200 to
°
850 C) or
(−
PT100 200 to
°
200 C)
− °
C input range: (±0.3% of indication value or ±0.8°C, whichever is
200 to 850
−
200 to 200°C input range: (±0.3% of indication value or ±0.5°C, whichever is
250 ms/2 points
The temperature data is multiplied by 100 and sent to the Master as 8-digit
binary data. (The data for each input consists of two words.)
Not supported.
Supplied from slice bus.
None
None
Default: Temperature data for 2 points
The Setting Tool can be used to allocate
the peak value, bottom value, top value,
valley value, rate of change, comparator
results, Status Flags, etc.
No setting required.
No setting required.
GRT1-TS2PK
Removable terminal block
−
PT, JPT, PT2, or JPT2
PT1000 ( 200 to
°
850 C) or
(−
PT1000 200 to
°
200 C)
larger) ±1 digit max.
larger) ±1 digit max.
250 ms/4 points
Supported.
Supplied from communications
power supply.
70 mA max.
Poll, Bitstrobe, and COS/cyclic
Default: Temperature data for 4
points
The DeviceNet Configurator can be
used to allocate peak value, bottom
value, top value, valley value, rate of
change, comparator results, Status
Flags, etc.
Set using the rotary switches or the
DeviceNet Configurator.
Automatically detected: Uses baud
rate set for Master Unit.
Section 6-1
DRT2 Series
DRT2-TS04P