AW Gear Meters EMO-500 - Manual (Page 35)

EMO-500
Operation and Programming Manual
34
Important Points for Serial Communication
1. Serial communication is disabled if the EMO-500 is in programming mode.
2. All characters in the communication string should be in CAPITALS.
Example: the EMO-500 recognizes

K

is ASCII 75, but it does not recognize

k

is ASCII 107.
3. All numbers in the communication string are represented in hexadecimal format.
4. Do not try to read or write more than 12 bytes at a time due to limitations of the EMO-500's
serial buffers.
5. The least significant byte of a number is stored at the lower address.
6. The

>

in the transmit string and the

A

in the reply string are not used in the checksum
calculation.
The ASCII characters needed for checksum calculations are:
ASCII Decimal ASCII Decimal
0 48 A 65
1 49 B 66
2 50 C 67
3 51 D 68
4 52 E 69
5 53 F 70
6 54
7 55
8 56 J 74
9 57 K 75