Installation & Operation Manual Proven Quality since 1892
ECON actuator Fig. 7907, type ELA80 – 3000 www.eriks.com
Rev.23 – August, 2023 37
6 FIELDBUS COMMUNICATION PROTOCOLS
6.1 ProfiBus Contoller
• The ProfiBus Controller is providing multiple communication
functions by using a 8 bit microprocessor and ProfiBus controller.
• Providing the operator with actuator status information in order to
confirm if the ProfiBus device and actuator is working
correctly
• The maximum transmission speed is 12Mbit/s.
• Easily can be switched between PCU-version and ON-
OFF-version.
• Providing System Redundancy by using dual ports and
high reliability.
• LED lamps indicate the actuator status.
6.1.1 Specification
87V ~ 270V ac ±10% , 50/60Hz ±2% 4VA max.
Input power must match motor ratings
ProfiBus communication (RS-485 base)
1000m @ 9.6 ~ 187.5 k Baud
SMW250-3P * 4 ( ProfiBus signal )
YW396-5P (Main power & Motor)
SMW250-8P (CTS, OTS, CLS, OLS contact input)
SMW250-6P (Firmware update connector)
SMW250-4P (Debug connector)
Power white, blue LED
Fault yellow LED
Motor open red LED
Motor close green LED
Triac 250V ac, 16A max. (Inductive load)
90% RH max. (non-condensing)
6.2 ModBus Controller
• This clause explains the ModBus-RTU Slave
Module (MBRSM). Positioned at level 7 of the
OSI model, ModBus is an application layer
messaging protocol that provides client/server
communication between devices connected on
different types of buses or networks.
• As a ModBus Serial Line protocol, ModBus-RTU
(Remote Terminal Unit) is a Master-Slave
protocol which takes place at level 2 (Data Link
layer) of the OSI model. The master initiates the
communication by transmitting the Function Code
(a ‘request’) to the address of a slave and after
receiving and processing the Function Code, the slave returns a message (a ‘response’).
• The slaves shall not communicate with each other without the request of the master. Since the
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