SMC Networks HRR012-A*-20 Series Operation Manual

HRX-OM-W004
Chapter 2 Contact input/output communication
2.5 Contact input signal HRR Series
2-14
4)
Digital input signal 1 is for Run/Stop signal (Signal type: Alternate), digital input signal 2 is for
external switch signal (Signal type: Alternate).Refer to Chapter 2.5.2 for details of the external
switch.
① The product starts operation when the Run/Stop signal from the user is turned
on.
②
It reads the signal of the external switch signal (N.O type) after the time which
has been set for the delay timer of reading.
The factory default setting of the delay timer of reading is 0sec. Refer to 2.4.2 for
setting.
③
When the external switch signal (N.O. type) has been turned off for the time set
for OFF detection timer, it is recognized as OFF.
The factory default setting of the OFF detection timer is 0sec. Refer to 2.4.2 for
setting.
④
AL26 contact input 2 signal detection alarm is generated. The operation of the
product stops.
"Operation stop" is the default setting for AL26. The product can be set to
continue operation or not to detect the alarm. Refer to the “Installation /
Operation” manual for details.
∗The product stops operation when the Run/Stop signal is turned off during
operation. Afterwards, the alarm is not generated even if the external switch
signal is turned off.
2.5.2 Signal of the external switch
This product can be monitored by reading the signal of the
external switch prepared by the customer.
This product generates an alarm and stops operating when a
problem is detected from the external switch.
Monitoring mode can be selected from “continuous monitoring” or
“monitoring only during operation”. Refer to Table 2.5-3.
Select the external switch 1 or 2 or both depending on the
customer’s system. Refer to 2.4.2 for setting method.
The number of monitored external switches depends on the
contact input signal function. Refer to Table 2.5-3
You can set the product to continue operation or not to detect the
alarm. Refer to the “Installation / Operation” manual for details
Table 2.5-3 Monitoring method for contact input
Contact input delay timer for
reading
Monitoring method
0 sec Continuous monitoring
1 to 300 sec Monitor only during operation
OFF
ON
Run
Stop
Product condition
OFF
ON
External switch signal
OFF Detection time
r
③
④①
②
Run/Stop signal
Delay timer of reading

SMC Networks HRR012-A*-20 Series Specifications

General

Brand	SMC Networks
Model	HRR012-A*-20 Series
Category	Chiller
Language	English