Siemens POL638 Series User Manual

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Siemens Standard application AHU CE1P3977en_02
Building Technologies Communication 01.02.2010
Parameter Range Function
− 2 RU ing 1 RU, 1snsr+RU or 2 RU, the interface to the
room unit connection is enabled.
Settings Goes to page with all settings relevant to param-
eterizing room units.
Inputs Go to page with temperature inputs.
Reset required !!
− 
− Execute
As a matter of principle, the controller must be
set after parameterization to assume the data.
Unit > System overview > Communication > Modbus
Parameter Range Function
Communication − OK
− Alarm
Status of Modbus communication.
Internal
− Disable
− Master
− Slave
Generally enables internal MODBUS and func-
tion of MODBUS over RS485:
− Internal interface is disabled.
− Internal RS485 interface is master.
− Internal RS485 interface is slave.
Internal Slave address 0…247 Controller address on the RS485 bus.
Internal settings
RS485 Go to parameter page for RS485 MODBUS in-
terface.
TCP/IP − Go to parameter page for TCP/IP settings.
Module1 Modbus − Go to parameter page for MODBUS interface on
module 1.
Module1 Modbus − Go to parameter page for MODBUS interface on
module 1.
Module1 Modbus − − Go to parameterization page for MODBUS
interface on module 1.
Unit > System overview > Communication > Modbus > RS485
Parameter Range Function
− −
Baud rate − 2400
− 4800
− 9600
− 19200
− 38400
Transmission rate on bus. All participants must
have the same setting.
Parity − Even
− Odd
− None
Parity. All participants must have the same set-
ting.
Stop bit − One
− Two
Number of stop bits. All participants must have
the same setting.
Delay time 0…2147483647 [ms] Response telegram delay.
Parameter Range Function
Response timeout 0…2147483647 [ms] Settings access time for master.
The master must undertake read access within this
period, otherwise an alarm is triggered (this func-
tion is not yet fully implemented).
Termination
− Passive
Internal bus connection for the basis controller:
− No bus terminating resistor.
MODBUS configuration
RS485 MODBUS
parameterization
Basis Document Siemens Climatix Control System
BDCX.100820.01GB
Page 120

Siemens POL638 Series Specifications

General

Operating voltage	24 V DC
Mounting	DIN rail
Protection class	IP20
Input Voltage	24 V DC
Communication Interface	Ethernet