Satec PM130 series - Page 7

6
Check sum
Arithmetic sum, calculated in a 2-byte word over fields #2, #3, #4 and #5 to produce a one-byte
check sum in the range of 22h to 7Eh (hexadecimal) as follows: [
Σ
(each byte - 22H)] mod 5CH
+ 22H
Trailer
Two ASCII characters CR (ASCII 13) and LF (ASCII 10).
NOTE
Fields #3 and #4 of the instrument response are always the same as those in the host request.
Table 2-1 Specific ASCII Requests
Message type Description
Char ASCII Hex
0 30h Read basic data registers
1 31h Read basic setup
2 32h Write basic setup
3 33h Read instrument status
4 34h Reset/clear functions
8 38h Reset the instrument
9 39h Read version number
? 3F Read extended status
G 47h Read pulsing setpoint (E)
g 67h Write pulsing setpoint (E)
O 4Fh Read Min/Max log
(E) - available in the PM130E
Table 2-2 Direct Read/Write ASCII Requests
Message type Description
Char ASCII Hex
A 41h Long-size direct read
a 61h Long-size direct write
X 58h Variable-size direct read
x 78h Variable-size direct write