Hach Anatel PAT700 User Manual page 153

Date
The Date is transmitted similar to a 32-bit Word with the MOST significant byte first, then
the next MOST significant, until all the bytes are transmitted. FC3 reads 16-bit items at a
time; therefore, two registers are required to read each Date data item. Combine the two
characters in the 1st Register to obtain the four digit year.
Example (Decimal): 2007-10-05 (Format in YYYY-MM-DD)
Value (Hex)
0x07D70A05
Time (Format 1)
The Time is transmitted similar to a 32-bit Word with the MOST significant byte first, then
the next MOST significant, until all the bytes are transmitted. FC3 reads 16-bit items at a
time; therefore, two registers are required to read each Time data item. The Time is
always in 24 Hours Format.
Example (Decimal): 00:15:46:25 (Format in DD:HH:MM:SS)
Value (Hex)
0x000F2E19
Time (Format 2)
The Time is transmitted similar to a 32-bit Word with the MOST significant byte first, then
the next MOST significant, until all the bytes are transmitted. FC3 reads 16-bit items at a
time; therefore, two registers are required to read each Time data item. The Time is
always in 24 Hours Format.
Example (Decimal): 46:25 (Format in HH:MM)
Date & Time
The Date and Time is transmitted similar to a 32-bit Word with the MOST significant byte
first, then the next MOST significant, until all the bytes are transmitted. FC3 reads 16-bit
items at a time; therefore, two registers are required to read each Date and Time data
item. The Time is always in 24 Hours Format. Combine the two characters in the 1st
Register and convert from Hex to Decimal to obtain the four digit year.
Example (Decimal): 2007-07-28 15:46:25 (Format in YYYY-MM-DD HH:MM:SS)
Value (Hex)
0x07D7071C0F2E1900
1st Register
1st
0x07
1st Register
1st
0X00
Value (Hex)
0x2E19
1st Register 2nd Register
1st 2nd 1st
0x07 0xD7 0X07
2nd 1st
0xD7 0x0A
2nd 1st
0x0F 0x2E
1st Register
0x2E
3rd Register
2nd 1st 2nd
0x1C 0x0F 0x2E
Modbus Protocol
2nd Register
2nd
0x05
2nd Register
2nd
0X19
2nd Register
0x19
4th Register
1st 2nd
0x19 0x00
Page 151