SMC Networks HRR012-A*-20 Series Operation Manual

HRX-OM-W004
Chapter 3 Serial communication
3.6 Setting and checking HRR Series
3-4
Message to notify the completion of the process is returned when the action
for the written request message is completed.
Send a read request message to confirm if the setting was written as
requested.
○Setting limit of circulating fluid temperature
When the circulating fluid set temperature is written by communication,
the data is stored in FRAM. When the product restarts, it restarts with the
value which was set before the restart. The number of times it is possible
to overwrite FRAM is limited. Data is only stored in FRAM when it receives
a circulating fluid set temperature which is different from the previous
temperatures. Please check how many times it is possible to overwrite
FRAM, and avoid unnecessary changes of the circulating fluid set
temperature during communication
3.6 Setting and checking
3.6.1 Setting and checking items
The table below explains the setting items of the MODBUS communication
function and the initial values.
Table
3.6-1 Communication setting items
Initial
val ue
Select/setting range
TOP
screen
－
COMM
－
MENU Communication setting menu TOP screen
No.1
screen
Serial protocol ASC ASC/RTU PROT Select serial protocol.
No.2
screen
Communication
specification
485 485/232C TYPE Select RS - 485 / RS - 232C.
No.3
screen
RS-485 terminal unit OFF OFF/ON TERM
Select whether RS - 485
terminating resistance is present or not.
No.4
screen
Slave address 1 1
～
32
SLV
⇒
ADD R
Set the slave address.
No.5
screen
Communication
speed
（
bps
）
19.2 9.6/19.2 SPEED Set the communication speed.
Display
No.
Item
Display unit
Contents
Upper stage
（
White
）
Lower stage
（
Green
）

SMC Networks HRR012-A*-20 Series Specifications

General

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