Honeywell UDC2500 User Manual
Page 195
Modbus RTU Function Codes
4/07
UDC2500 Universal Digital Controller Product Manual
181
Register Address Structure
Table 9-1 Integer Parameter Type
Register
Numbers
(Dec)
Name
Access
Notes
1
Type = 1
NOT SUPPORTED
16-bit Unsigned Integer
2
Attribute
NOT SUPPORTED
1 = Read Only,
2 = Read/Write
3
Value (16 bit integer)
Read / Write
4
Not Used
NOT SUPPORTED
5
Low Range (16 bit integer)
NOT SUPPORTED
6
Not Used
NOT SUPPORTED
7
High Range (16 bit Integer)
NOT SUPPORTED
8
Not Used
NOT SUPPORTED
9 to 13
Description Text (ASCII string)
NOT SUPPORTED
Table 9-2 Floating Point Parameter Type
Register
Numbers
(Dec)
Name
Access
Notes
1
Type = 2
NOT SUPPORTED
IEEE Floating Point
2
Attribute
NOT SUPPORTED
1 = Read Only,
2 = Read/Write
3
Value (float high word)
Read / Write
4
Value (float low word)
NOT SUPPORTED
5
Low Range (float high word)
NOT SUPPORTED
6
Low Range (float low word)
NOT SUPPORTED
7
High Range (float high word)
NOT SUPPORTED
8
High Range (float low word)
NOT SUPPORTED
9 to 13
Description Text (ASCII string)
NOT SUPPORTED
Register Count
The register count depends on the data format of the registers being read or written.
Integer data is represented in sixteen bits and is transferred high byte first.
Floating point data is transferred in IEEE 32-bit format.
The register count definitions are:
0001 = Integer Data
0002 = Floating Point Data