SMC Networks HRR012-A*-20 Series Operation Manual

HRX-OM-W004
Chapter 4 Communication alarm function
HRR Series 4.1 Communication alarm occurs
4-1
Chapter 4 Communication alarm
function
Monitors whether the serial communication is sent/received properly between
the product and the customer’s device. This feature is only valid when the
communication mode is set to SERIAL mode.
Abnormal signals or disconnection of the communication cable can be notified
immediately by setting the alarm function to match the interval at which
messages are sent from the customer device. When the communication is
restored, the alarm is automatically reset.
Do not use this function when the customer device does not send messages
regularly.
4.1 Communication alarm occurs
Fig 4.1-1 shows when an alarm occurs. Refer to 4.3 ‘’Setting and checking’’
for the setting method.
●
Changing of communication error
Operation continues when an alarm occurs.
●
Time for monitoring the communication error
180 sec
When the customer's device is sending messages every 60sec, if the
communication cable is disconnected and no message is received for 180sec,
the product generates AL29 communication error alarm to notify the error.
This productYour system
Write or read
Write or read
60 sec.
60 sec.
60 sec.
60 sec.
Broken
wire
o
r
coming
of
f
Passage o
f
180 sec.
Excess at no
communicatio
n monitoring
time.
A
L29 Communication
error is generated.
Operation continues
Monitoring
time
Monitoring
time
Fig
4.1-1 Communication alarm example

SMC Networks HRR012-A*-20 Series Specifications

General

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