7ML19981FB05 MultiRanger 100/200 – INSTRUCTION MANUAL Page 115
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Communication Appendix A
Writing Parameters
To set parameters through Modbus do the following steps:
1. Send the parameter, its primary index, and its secondary index (usually 0) to
registers 40,090, 40,091, and 40,092.
2. Write the value to registers 40,096 and 40,097.
3. Write the desired format word to register 40,093 to enable the MultiRanger to
interpret the value correctly.
Format Register
For example, to format the level reading so that it is shown in percent with two decimal
places shifted left, the format bits would look like this:
The value sent to the MultiRanger is 0001001000000000 binary or 512 decimal. The value
512 is sent as an integer to register 40,093 to format the output words 40,094 and 40,095
accordingly.
If the numeric data type is set for integer and the value contains decimal places, they are
ignored. In this situation, use the decimal offset to ensure that you have an integer value
and then write your code to recognize and handle the decimal offset.
Bits Values Description
1-8 0-2 Error Code
9-11 0-7 3-bit number representing decimal offset
12 0/1 direction of offset (0 = right, 1 = left)
13 0/1 Numeric format: Fixed (0) or Float (1)
14 0/1 Read or Write of data, Read (0), Write (1)
15 0/1 Word order: Most Significant Word first (0), Least
Significant Word first (1)
16 Reserved
Bit
Numbers
16 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01
Bit Values0000001000000000
reserved
most significant first
read
fixed format
offset direction to right
decimal offset of 2
no error code
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