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80209C_MHW_850-1650-1850_01-2020_ENG_pag. 244

5.19.3. Setting the Master Modbus serial port

GF_eXpress may be used to set the communication speed

(MASTER_KBAU=19200, 38400, 57600, 115200 baud),

parity type (MASTER_PAR=NO_PARITY, ODD, EVEN) and

timeout (MASTER_TIM=60…1000ms) of the Master Modbus

serial.

5.19.4. Modbus object summary page

The “Overview” page in the Master Communication section

of GF_eXpress may be used to obtain an overview of the

Modbus parameters the device is exchanging with the

connected nodes.

Information on Master device variables appears in the

section on the left:

• “OUT” column: name of the parameter sent (ONLY

in the case of a writing oforation).

• “MAS” column: value of the parameter written and\

or read.

• “ERR” column: status of communication with the

slave device..

• “UPD” column: real parameter update time

• “ACCESS” column: type of oforation conﬁgured:

Write Only:

Read Only:

Read and Write:

The parameters set for communication with the Slave

node(s) appear on the right:

• “NODE” column: number of the Slave node with

which to conduct Modbus

communication

• “ADDRESS” column: Modbus address of the para-

meter to be exchanged (in read

and\or write mode)

• “DESCRIPTION” column: description of the object to be

exchanged (in read and\or write

mode)

gefran 850 User Manual

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