USER MANUAL – Z-SG
17
If load cell end scale is equal to 50kg, tare is equal to 10kg and analog output scale range is
0..10V, the maximum net weight is
Max net weight = 50
– 10 = 40kg
When a weight of 40Kg is measured the Analog Output will reach 100% (10 Volts).
12.
Easy-SETUP
Free-downloadable from the www.seneca.it; the Z-SG/Z-SG-L configuration and the calibration
can be performed by RS232 or RS485 bus communication.
13.
Modbus RTU protocol
The Modbus protocol supported by Z-SG I sthe Modbus RTU protocol.
The RS485 port Modbus parameters can be configured from Modbus or from Dip switches.
The RS232 COM port parameters are fixed: Baudrate 2400 baud, Parity None, Delay None, Modbus Station
address 1.
All registers are “Holding register” (Read Modbus function 3) with the convention that the first register is
the 40001 address (offset 0).
The following Modbus functions are supported:
Read Single Modbus Register (function 3)
Write Single Modbus Register (function 6)
Write Multiple Modbus Registers (function 16)
All values in 32bits are stored into 2 consecutive registers, for example:
Net Weight in floating point 32 bits is stored into registers 40064 and 40065, the most significant word is
the register 40064, the less significant word is the 40065 (default).
So the 32bits value is obtained by the following relation:
NetWeight=
𝑅𝑒𝑔
40064+(
𝑅𝑒𝑔
40065×2^16)=
𝑅𝑒𝑔
40064+(
𝑅𝑒𝑔
40065 ×65536)
For the floating point values the Z-SG-L model can Swap the Most significant word with the Less significant
word.
For more information about this protocol please refer to Modbus specification website:
