Delta AS Series Programming Manual page 655

AS Ser ies Pro gra mm in g M anu al
API Instruction code
1209
Device X

S
D

n
Data
type
S
D
n
Symbol
_6
Explanation
1. Communication protocols use the sum check function to compare checksums on the same data on different
occasions or on different representations of the data to verify data integrity.
2. When SM606 is OFF, the instruction uses the 16-bit conversion mode. The instruction adds up n pieces of data in
the registers starting from the register specified by S (eight bits as a group). The instruction stores the sum in the
register specified by D, and stores the values of the parity bits in D+1.
3. When SM606 is ON, the instruction uses the 8-bit conversion mode. The instruction adds up the n pieces of data in
the registers starting from the register specified by S (eight bits in a group, and only low eight bits are valid). The
instruction stores the sum in the register specified by D, and stores the values of the parity bits in D+1.
4. The operand n must be between 1–256.
6 - 3 7 6
CCD P
Y M S T C
  
  
  



Operand
S, D, n
HC D FR SM
 

 



Pulse instruction 16-bit instruction
AS
S ： First device
D ： Device where the sum is stored
n ： Number of pieces of data
Function
Finding the sum check
SR E K 16# "$"
   
32-bit instruction
AS -
F