Hach MET ONE 6015 - RS485 Serial Output with Modbus RTU Protocol

13. On the Basic Setup tab, change the settings back to the previous
values.
14. Click Save Settings.
Table 7 Output voltage with 100, 250 and 500-ohm resistors
Sample count 100 Ω 250 Ω 500 Ω
0 0.40 V 1.00 V 2.00 V
100 0.56 V 1.40 V 2.80 V
200 0.72 V 1.80 V 3.60 V
300 0.88 V 2.20 V 4.40 V
400 1.04 V 2.60 V 5.20 V
500 1.20 V 3.00 V 6.00 V
600 1.36 V 3.40 V 6.80 V
700 1.52 V 3.80 V 7.60 V
800 1.68 V 4.20 V 8.40 V
900 1.84 V 4.60 V 9.20 V
1000 2.00 V 5.00 V 10.00 V
RS485 serial output with Modbus RTU protocol
Instruments with the RS485 Modbus communication option use industry-
standard Modbus RTU protocol. In this communication mode, a series of
registers hold data about measurement results and operation
parameters.
When a ModbusTCP connection is made, the user can use all the
configuration options in the Modbus register map. Refer to the company
website for the Modbus register map. Write drivers to communicate with
the instrument through these registers with the Modbus RTU protocol.
The RS485 serial network circuit supplies communications for a
maximum of 32 instrument
s and a control computer. Only one
instrument can transmit data at a time. Each instrument must have a
unique instrument address.
1. Turn the instrument over. The DIP switch is on the bottom of the
instrument.
2. Change the DIP switch setting to select a unique network address for
the instrument. Refer to Table 8.
Note: Address 0 can only be used with FXB protocol. Address 0 is reserved for
use as a broadcast address for Modbus RTU. If address 0 is set with Modbus
protocol, the instrument will use address 1.
Table 8 DIP switch settings for network address
Network address Switch 1 Switch 2 Switch 3 Switch 4 Switch 5
0 Off Off Off Off Off
1 On Off Off Off Off
2 Off On Off Off Off
3 On On Off Off Off
4 Off Off On Off Off
5 On Off On Off Off
6 Off On On Off Off
7 On On On Off Off
8 Off Off Off On Off
9 On Off Off On Off
10 Off On Off On Off
11 On On Off On Off
12 Off Off On On Off
13 On Off On On Off
14 Off On On On Off
15 On On On On Off
16 Off Off Off Off On
17 On Off Off Off On
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