YSI IQ SensorNet MIQ/A-MOD Module - Manual (Page 20)

Interface for the Modbus RTU MIQ/(A-)MOD
20 ba76021e01 01/2012
3.3 Commissioning
To connect the IQ S ENSOR N ET to the Modbus, preparations are
required on the Modbus module, on the Modbus master and possibly
on the IQ S
ENSOR N ET as well.
Preparing the Modbus
module
Configuring the Modbus
master
Preparing the
IQ S ENSOR N ET
Preparations on the IQ S ENSOR N ET may be necessary if the system
should transmit the data of the sensors to the Modbus with a specific
assignment of the sensors to sensor numbers (S01 ... S20) (see
section 3.5).
Note
The sensor numbers are automatically assigned by the IQ S
ENSOR N ET
in the order in which sensors are recognized by the system. The current
assignment of sensor numbers to the sensors can be seen in the List
of sensors (see System operating manual, chapter List of sensors).
1 Open the MIQ/(A-)MOD module (see system operating
manual).
2 Set the address with the 7 dip switches at the Modbus module
(S1: dip switches 1-7) (see section 3.2.3).
3 Set the baud rate with the 3 dip switches at the Modbus module
(S1: dip switch 8 and S2: dip switches 1-2) (see section 3.2.3).
4 Set the parity using the two dip switches on the Modbus
module (S2: dip switches 3-4) (see section 3.2.3).
5 Connect the cable to the Modbus with the terminals of the
Modbus module (see section 3.2.1).
6 Check and if necessary correct the position of the Modbus
terminator switch (see section 3.2.2).
7 Configure the Modbus master for the new component (see
Modbus documentation).