Honeywell HC900 - Manual (Page 64)

56 HC900 Hybrid Controller Communications User Guide Revision 10
12/07
Example
Query: Read Variables 1 and 2 from HC900 at address 1 using Function Code 3 (hex codes).
TCP:
00 03 18 C0 00 04
RTU:
01 03 18 C0 00 04 CRC CRC
Response: from HC900 where Variable 1 = 100.0 and Variable 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
6.7 Time
The addresses given in Table 6-6 do not necessarily apply to time parameters in the custom map. For
custom addresses view or print a report in HC Designer.
In HC Designer’s custom map these parameters are grouped under the Item Filter “System Parameters.”
You must add them all to the custom map in order to write to them. See Attention below.
Table 6-6 Time parameters
Fixed
Address
(hex) Fixed
Register
(decimal) Parameter Access Notes
1DF0 7665 Hours R/W 0 to 23
1DF1 7666 Minutes R/W 0 to 60
1DF2 7667 Seconds R/W 0 to 60
1DF3 7668 Month R/W 1 to 12
1DF4 7669 Day R/W 1 to 31
1DF5 7670 Year R/W 1970 to 2037
The values read are always in the range
of 1970 to 2037 for a write. 0 – 37
represents 2000 – 2037, 70 – 99
represents 1970 – 1999
1DF6 7671 Week Day R 0 to 6 (0 = Sunday)
ATTENTION
Time registers must all be written in a single transaction. Writing to Week Day is optional.