D Etails On Models With Canopen; Diagnostics Of Models With Leds - gefran MK4 Series Installation Manual

DETaIlS ON MODElS WITH CaNOPEN OuTPuT (MK4-C and IK4-C)
The series of magnetostrictive transducers with CANopen output integrates a microprocessor to process measurement and
communication with the CAN field bus by using the CANopen DS-301 protocol and Device Profile DS-406.
By connecting multiple transducers in a CANopen network, it's possible to choose between models with one connector or
with two connectors.
When using a transducer with single connector, the connection must be in the form of "T" connections, as shown in Fig. 11.
In order to avoid the use of "T" connections, it's possible to opt for the 2-connectors model (available with the IK4-C series)
to make a connection as shown in Fig. 12.
If the CANopen network terminates with a transducer, that transducer must contain a termination resistor.
The termination resistor integrated in the transducer is an option that can be ordered by specifying it in the order code for
the chosen model (see "Order code" on the datasheet).
Each device connected in the CANopen network must have a unique node number that identifies it.
Each magnetostrictive transducer is factory programmed with a standard node number of "127".
A few changes to the settings of transducers with CANopen output (such as node number, baud rate, etc.) can be perfor-
med by connecting them to a CAN master and programming the parameters in the proper way.
The communication protocol, the list, and the description of the transducer's parameters are shown in the manual, that can
be downloaded from the website www.gefran.com.
Some magnetostrictive transducers have LEDs to display some simple diagnostic functions.
Based on the model, the state of the LEDs may have different meanings, as shown in the following table.
IK4-a/SK4-a Series (analogue output) Serie IK4-a/SK4-a (uscita analogica
red lED
on
flashing
off
IK4-S Series (SSI output) and IK4-C Series (CaNopen output)
red lED
on
off
85190A_MAN_Installazione_MK4-IK4/SK4_11-2012_ENG
Fig. 11

DIaGNOSTICS OF MODElS WITH lEDS

Meaning
Transducer powered and working correctly
Echo absent (magnet out of measurement range or internal device error)
Transducer not powered
Meaning
Echo absent (magnet out of measurement range or internal device error)
Transducer working correctly
Fig. 12
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