Page 102 HydroRanger 200 – INSTRUCTION MANUAL 7ML19985FC03
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Modbus Register Types
Parameter Specific Index Method (P782 = 1)
The Parameter Specific index method sets the index values for each parameter
independently. Use this method to read multiple parameters with different index values.
1. Write the primary index, secondary index, and data format values into the
appropriate format register.
For example, to read the following information:
• measured level (P921)
• in units with three decimal places
•from Transducer One
Send the integer value 01008 to register 46,921.
2. Read the value from the appropriate parameter register (the example uses 44,921).
Types of values are:
•
Numeric Values
on page 105
•
Bit Values
on page 105
•
Split Values
on page 106
•
Text Messages
on page 107
•
Relay Function Codes (P111 Only)
on page 108
A value of 22,222 indicates that an error occurred. Specify a different format type
and try again.
Writing Parameters
The method of writing parameters is similar to the method of reading them. Become
familiar with
Reading Parameters
, page 101, before attempting to write any parameters.
To write parameter values to the HydroRanger 200, follow these steps:
Global Index Method (P782 = 0)
1. Write the primary index value into R43,999.
2. Write the secondary index value into R43,998.
3. Write the desired format value into the appropriate format register.
4. Write the value to the appropriate parameter register.
Parameter Specific Index Method (P782 = 1)
1. Write the primary index, secondary index, and data format values into the
appropriate format register.
2. Write the value to the appropriate parameter register.
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