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Installation and operating instructions • Wilo-Control SC2.0-Booster • Ed.01/2023-09 55
14.2 ModBus: Data types
Data type Description
INT16 Integer in the range from -32768 to 32767.
The number range actually used for a data point may vary.
INT32 Integer in the range from -2,147,483,648 to 2,147,483,647.
The number range actually used for a data point may vary.
UINT16 Unsigned integers in the range from 0 to 65535.
The number range actually used for a data point may vary.
UINT32 Unsigned integers in the range from 0 to 4,294,967,295
The number range actually used for a data point may vary.
ENUM Is a list. Only one of the values listed in the parameters can be set.
BOOL A Boolean value is a parameter with exactly two states (0–false and 1–
true). Generally, all values greater than zero are classified as true.
BITMAP* Is an array of 16Boolean values (bits). Values are indexed from 0 to 15. The
number read from or written to the register is the sum of all bits with the
value 1 multiplied by 2 to the power of its index.
• Bit 0: 2
0
=1
• Bit 1: 2
1
=2
• Bit 2: 2
2
=4
• Bit 3: 2
3
=8
• Bit 4: 2
4
=16
• Bit 5: 2
5
=32
• Bit 6: 2
6
=64
• Bit 7: 2
7
=128
• Bit 8: 2
8
=256
• Bit 9: 2
9
=512
• Bit 10: 2
10
=1024
• Bit 11: 2
11
=2048
• Bit 12: 2
12
=4096
• Bit 13: 2
13
=8192
• Bit 14: 2
14
=16384
• Bit 15: 2
15
=32768
BITMAP32 Is an array of 32Boolean values (bits). Please check Bitmap for the calcula-
tion details.
* Example for clarification:
Bit 3, 6, 8, and 15 are 1. All others are 0. The sum is then 2
3
+2
6
+2
8
+2
15
=8+64+256+32768
=33096.
The reverse is also possible. Based on the bit with the highest index, check whether the
read number is greater than/equal to the power of two. If this is the case, bit 1 is set and the
power of two is deducted from the number. Then the check with the bit with the next
lower index and the recently calculated residual number is repeated until bit 0 is obtained or
the residual number is zero.
Example for clarification:
The number read is 1416. Bit 15 will be 0, since 1416<32768. Bits 14 to 11 will also be 0.
Bit 10 will be 1, since 1416>1024. The remainder will be 1416-1024=392. Bit 9 will be 0,
since 392<512. Bit 8 will be 1, since 392>256. The remainder will be 392-256=136. Bit 7
will be 1, since 136>128. The remainder will be 136-128=8. Bits 6 to 4 will be 0. Bit 3 will
be 1, since 8=8. The remainder will be 0. The remaining bits 2 to 0 will thus all be 0.
14.3 ModBus: Parameter overview
Holding register
(protocol)
Name Data type Scaling and
unit
Elements Access* Supple-
mentary
40001
(0)
Communication profile version UINT16 0.001 R 31,000
40002
(1)
Wink service BOOL RW 31,000
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