Yaskawa FSP Amplifier FlexWorks - Manual (Page 204)

Serial Interface Protocol
204
6.2.2.1. Checksum Calculation
Checksum is calculated for a binary message. Each factor in the
equation (excluding N and CR) is two digits of a hexadecimal
number and consists of two adjacent
bytes.
The checksum of the message: N A M id1 id2 C1 C2 V1 V2 P1 P2 P3
P4 S1S2 CR is:
S1S2 = 0x100 – (a m + id1id2 + V1V2 + P1P2 + P3P4)
Only the two digits on the right are considered.
N
OTE
:
It is possible to work without checksum by setting Pn2C6 = 0.
When working
without checksum, set 00 instead of checksum
(S1S2).
6.2.2.2. Master Message Format Example
CONTROL ON command
Example of CONTROL_ON command to axis 0 in Immediate mode:
Format:
N A M I D 1 I D 2 C1 C2 V1 V2 P1 P2 S1 S2 CR
N 0 A 0 0 4 5 0 0 0 1 B 0 CR
Where:
A = 0 Axis number 0
M = 0xA Immediate mode
ID1 = 0; Id2= 0 Ignore message ID
C1 = 4; C2 = 5 Command operational code = 0x45
V1, V2 = 0 The arguments are specified by numerical
values, not variable ID numbers.
P1 = 0; P2 = 1 One command argument (two digits)
S1 = B; S2 = 8 0x100–(0x0A+0x00+0x45+0x01) = 0xB0