Panasonic MINAS A5-series, Operating Instructions Manual

Page: 314 / 394

7-18
RS485 Communication Protocol
Refer to the instruction manual of the host for the transmission/reception method of com-
mand. Following shows the communication example of the driver to Pr5.31 “Axis address
= 1”.
Reception of
absolute data
(15 characters)
N
N
N
N
Y
Y
Y
Y
Host requests
for absolute
data to driver
Host receives
absolute data
from driver
Transmission starts
transmission finishes
06h transmission 15h transmission
Check sum
OK'ed reception
01h transmission
00h transmission
81h transmission
05h transmission
2Dh transmission
* 2
*1
* 1
* 3
D2h transmission
80h reception
05h reception
80h transmission
04h transmission
81h reception
04h reception
06h reception
Command from the host will be transmitted to the desired driver based on RS485 trans-
mission protocol. For details of communication, refer to P.7-27, "Communication".
Caution • Allow 50ms or longer interval for axis switching when you want to cap-
ture multiple axes data.
• It is recommended for you to repeat the above communication more
than 2 times to confirm the absolute data coincide, in order to avoid
mis-operation due to unexpected noise.
2. Absolute system
Transferring absolute data
Data of * 1, * 2 and * 3are determined by the setup of
Pr5.31 “Axis address” of the front panel.
Axis
address
(example)
Data of * 1 Data of * 2 Data of * 3
0 not usable with RS485 communication
1 81h 01h 2Dh
2 82h 02h 2Ch
3 83h 03h 2Bh
4 84h 04h 2Ah
5 85h 05h 29h
6 86h 06h 28h
7 87h 07h 27h
8 88h 08h 26h
9 89h 09h 25h
10 8Ah 0Ah 24h
11 8Bh 0Bh 23h
12 8Ch 0Ch 22h
13 8Dh 0Dh 21h
14 8Eh 0Eh 20h
15 8Fh 0Fh 1Fh
16 90h 10h 1Eh
17 91h 11h 1Dh
18 92h 12h 1Ch
19 93h 13h 1Bh
20 94h 14h 1Ah
21 95h 15h 19h
22 96h 16h 18h
23 97h 17h 17h
24 98h 18h 16h
25 99h 19h 15h
26 9Ah 1Ah 14h
27 9Bh 1Bh 13h
28 9Ch 1Ch 12h
29 9Dh 1Dh 11h
30 9Eh 1Eh 10h
31 9Fh 1Fh 0Fh
Check sum becomes OK'ed when the lower 8-bit of the
sum of the received absolute data (15 characters) is 0.