4 Modbus/TCP
Ethernet Option Board /
700.002 735 AE01
4-5
In the responses' data field, you can read the bit mask (0x41) that corresponds to the read discretes' status
after shifting with the 'Reference number' field value (0x00, 0x00).
LSB 0x1 MSB 0x4
0 1 2 3 4 5 6 7
1 0 0 0 0 0 1 0
Table 4-10: Response's Data Block Broken into Bits
In this example, the frequency converter is in the 'ready' mode because the first 0 bit is set. The motor does
not run because the 6 bit is set.
4.5 Holding Registers (400001 - 410633)
You can both read and write data from the MODBUS holding registers. The Ethernet board's MODBUS/TCP
implementation uses the following address map.
Address range Purpose
0001 - 2000 Converteam Application ID’s
2001 - 2099 FB Process Data IN
2101 - 2199 FB Process Data OUT
2200 - 10000 Converteam Application ID’s
10001 - 10033 Index Map
10101 - 10133 Index Map Read/Write
10301 - 10333 Measure Table
10501 - 10533 IDMap
10601 - 10633 IDMap Read/Write
10634 - 65535 Not Used
Table 4-11: Holding Registers
4.5.1 400001 – 402000 and 402200 – 410000, Application ID
Application ID's are parameters that depend on the frequency converter's application. These parameters can
be read and written by pointing the corresponding memory range directly or by using a so-called ID map
(more information below). It is easiest to use a straight address if you want to read a single parameter value or
parameters with consecutive ID numbers.
Address range Purpose ID
0001 - 2000 Application parameters 1 – 2000
2200 – 10000 Application parameters 2200 – 10000
Table 4-12: Parameter ID's
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