Pixsys ATR 243, Руководство пользователя, Страница: 24 / 96

24 - ATR243 - User manual
2
ACTIVE
ACTIVE
SPV
PV

x

= COOL

x

= COOL

x

= COOL

< 0

= 0

> 0

(
HEAT
)

( HEAT )

( HEAT )
COMMAND OUTPUT ( HEAT )
ALARM OUTPUT ( COOL )
COMMAND OUTPUT ( HEAT )
ALARM OUTPUT (
COOL
)
COMMAND OUTPUT ( HEAT )
ALARM OUTPUT (
COOL
)
SPV
PV
ACTIVE
ACTIVE
SPV
PV
ACTIVE
ACTIVE
3
ACTIVE
ACTIVE
SPV
PV

x

= COOL

x

= COOL

x

= COOL

< 0

= 0

> 0

( HEAT )

( HEAT )

( HEAT )
COMMAND OUTPUT ( HEAT )
ALARM OUTPUT ( COOL )
COMMAND OUTPUT ( HEAT )
ALARM OUTPUT (
COOL
)
COMMAND OUTPUT ( HEAT )
ALARM OUTPUT (
COOL
)
SPV
PV
ACTIVE
ACTIVE
SPV
PV
ACTIVE
ACTIVE
Parameter
co.t.c.
has the same meaning as the heating time cycle
t.c.
Parameter
coo.f.
(cooling fluid) pre-selects the proportional band multiplier
P.b.M.
and
the cooling P.I.D. time cycle
co.t.c.
basing on the type of cooling fluid:
coo.F.
Cooling fluid type
P.b.M. co.t.c
Air
Air 1.00 10
oiL
Oil 1.25 4
H2o
Water 2.50 2
Once selected, parameter
coo.f.
, parameters
P.b.M.
,
oud.b.
and
co.t.c.
can however be
changed.
8 Serial Communication
ATR243-21ABC-T, equipped with RS485, can receive and broadcast data via serial
communication using MODBUS RTU protocol. The device can only be configured as a
Slave. This function enables the control of multiple controllers connected to a supervisory
system (SCADA). Each controller responds to a master query only if the query contains the
same address as that in the parameter
SL.Ad.
The permitted addresses range from 1 to 254
and there must not be controllers with the same address on the same line.
Address 255 can be used by the master to communicate with all the connected equipment
(broadcast mode), while with 0 all the devices receive the command, but no response is
expected. ATR243 can introduce a delay (in milliseconds) in the response to the master
request. This delay must be set on parameter 72
se.de.
Each parameter change is saved
by the controller on EEPROM memory (100000 writing cycles), while the setpoints are
saved with a delay of ten seconds after the last change.
NB : changes made to Words that are different from those reported in the following table
can lead to malfunction.