GF Signet 4150 Turbidimeter - Manual (Page 14)

14 Signet 4150 Turbidimeter
Holding Registers
These 16-bit values are readable and changeable from the master. The data is stored and transmitted with the MSB ¿ rst
and then the LSB.
Address Type Register Value Default Function
40001, 40002 Float Offset value -- 0.0 0.0 – 2.0
40003 Int Decimal places 0 2 XXXXX.
1 XXXX.X
2 XXX.XX
3 XX.XXX
4 X.XXXX
40004 Int Response time -- 10 1–100 seconds
40005 Int LCD backlight -- 8 1–10 (brightest)
40006 Int Output option 0 0 None
1 4 to 20 mA
2 RS-485 (if available)
40007, 40008 Float 4 to 20 mA minimum value -- 0.02 0.0 to max range of instrument
40009, 40010 Float 4 to 20 mA maximum value -- 10.0 0.0 to max range of instrument
40011 Int RS-485 baud rate 0 3 1,200
1 2,400
2 4,800
3 9,600
4 19,200
40012 Int Instrument address -- 1 1–255
40013 Int Modbus serial mode 0 0 RTU
1 ASCII
40014 Int Alarm 1 type 0 0 Off
1 Low alarm
2 High alarm
40015, 40016 Float Alarm 1 set point -- 1.0 0.0 to max range of instrument
40017 Int Alarm 1 delay on -- 1 1–30 seconds
40018 Int Alarm 1 delay off -- 1 1–30 seconds
40019 Int Alarm 2 type 0 0 Off
1 Low alarm
2 High alarm
40020 Int Not used --
40021, 40022 Float Alarm 2 set point -- 1.0 0.0 to max range of instrument
40023 Int Alarm 2 delay on -- 1 1–30 seconds
40024 Int Alarm 2 delay off 1 1 1–30 seconds
40025 Int Units (scaling) 1 1 NTU
2 FNU
Valid Addresses
40001 – 40XXX
Code Name Broadcast
0x03 Read Holding Registers No
0x06 Preset Single Register Yes
0x16 Preset Multiple Registers Yes
Valid Command(s)
Float: This is stored in two consecutive addresses, with the ¿ rst address containing the least signi¿ cant word (lower part of mantissa)
and the second address containing the most signi¿ cant word (sign, exponent, and upper part of mantissa).
De¿ nitions
Format