Honeywell HC900 - Manual (Page 62)

54 HC900 Hybrid Controller Communications User Guide Revision 10
12/07
6.5 Analog Input - Function Code 03
Summary
Not available for versions 4.0 and later. Used to access analog input parameters for the first 8 channels of
the first 8 modules of Rack #1. (Address compatible with UMC800.)
To access any analog input channels use Function Code 04. See page 32.
Analog Input Example: AI1 through AI64. The mapping is with respect to card position starting with the
first card module position and continuing to the 8
th
module position. The first module position would be
AI1 thru AI8. The next AI card in slot 2 would be AI9 thru AI16 and so on.
Function Code Support:
Reads – Function Codes 03 (limited to the first 8 slots of Rack #1)
Table 6-4 Analog Input Value Addresses - Function Code 03
Fixed
Address
(hex) Fixed
Register
(decimal) Channel Number Access Notes
1800 6145 Analog Input #1 R
1802 6147 Analog Input #2 R
1804 6149 Analog Input #3 R
1806 6151 Analog Input #4 R
1808 6153 Analog Input #5 R
180A 6155 Analog Input #6 R
180C 6157 Analog Input #7 R
180E 6159 Analog Input #8 R
1810 6161 Analog Input #9 R
1812 6163 Analog Input #10 R
1814 6165 Analog Input #11 R
1816 6167 Analog Input #12 R
: : :
187E 6271 Analog Input #64 R
Floating Point
in Engineering
Units.
Example
Read Analog Inputs 1 and 2 from HC900 at slave address 01 using Function Code 03.
TCP:
00 03 18 00 00 04
RTU:
01 06 00 FA 00 01 CRC CRC
Response from HC900 where AI1 = 100.0 and AI 2 = 55.32
TCP:
00 03 08 42 C8 00 00 42 5D 47 AE
RTU:
01 03 08 42 C8 00 00 42 5D 47 AE CRC CRC