C500TS502 Omron, C500TS502 Datasheet - Page 57

• Manufacturer Part Number: C500TS502
• Description: RTD INPUT MODULE
• Manufacturer: Omron

Specifications of C500TS502

• Leaded Process Compatible: No
• Peak Reflow Compatible (260 C): No
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Using the Heartbeat
5- -7
Example 1
Example 2
Using the Heartbeat
The Module Good Flag, in both 2-word and 4-word modes, pulses at 1 Hz
rate (0.5 second ON, 0.5 second OFF) with a 45-55% duty cycle. This is the
heartbeat. It indicates that the microprocessor in the module is operating
properly and is providing updated input point conversion data to the PLC. In
critical applications, the PLC program can verify that the RTD module is op-
erational by examining and timing the heartbeat.
Simple programs to monitor the heartbeat are shown below. A pulse is gen-
erated on the rising edge of the heartbeat signal to reset the timer. The timer
is set for 1.5 seconds to allow for the variation in the heartbeat. More compli-
cated programs using both rising and falling edges of the heartbeat, and a
timer setting of 0.8 seconds can also be used.
Example 1 - Heartbeat in 2-word mode, module base addresses at I/O 002,
in C-Series.
Example 2 - Heartbeat in 4-word mode, module base addresses at I/O 002,
in CV-Series.
C-Series, 2-Word Mode
CV-Series, 4-Word Mode
C-Series
CV-Series
M-ALRM
M-ALRM
1000510
00307
M-HBT
20200
20201
M-HBT
020200
T0002
20201
T002
TIM 002 #0015
DIFU
20200
M-ALRM
M-ALRM
TIM
002
#0015
20201
020200
020201
Section 5- -7
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