Siko AP09 - Page 14

1 4 AP09 Datum 04.05.2000 Art.Nr. 78091 Z.Nr. 8665013 Änd.Stand 140/00
1st data byte 2nd data byte 3rd data byte
00 03 E8
Attention: If the status / address byte of the
command number under bit 5 and 6 is defined as
'11', the 3 data bytes do have a different signifi-
cance :
Byte 2 (1st data byte) : version number (eg.
V3.07 = 37 Hex). Version number is only sent
from AP09 to master and is irrelevant in case of
communication between master and AP09.
Byte 3 (2nd data byte) : position of the comma
(0...3) ie. programming of AP09's decimal point.
Byte 4 (3rd data byte) : single bits.
Bit no. Master -> AP09
7 no function
6 no function
5, 4 key's function:
00: without function
01: increm. measurement
10: reset
11: display of target value
3 reset
2 activate increm. measurement
1 no function
0 counting direction
bit = 0 increas. values with
counter-clockwise rotation;
bit = 1 increas. values with
clock-wise rotation
Bit-no. AP09 -> Master
7 bit = 1: battery flat
6 no function
5, 4 key's function:
00: without function
01: increm. measurement
10: reset
11: display of target value
3 no function
2 no function
1 no function
0 counting direction
bit = 0 increas. values with
counter-clockwise rotation;
bit = 1 increas. values with
clock-wise rotation
10. Protocol of AP09's interface
Date: 24.06.96 /E/Star
Hardware: RS485, 115200 Baud, EVEN
parity, 8 bit, 1 stop bit, no handshake
Protocol length: 5 bytes (1 status / addressby-
te, 3 data bytes, 1 byte for check sum)
Calculation of the check sum: EXOR-intercon-
nection of all bytes.
The data telegram always consists of 5 bytes:
1st byte : status-/ address byte
2nd byte : 1st data byte
3rd byte : 2nd data byte
4th byte : 3rd data byte
5th byte : check sum
1 . Status-/ address byte
Defines telegram type to be sent, ie. whether the
AP09's configuration has to be changed or only
a positional value is to be read out.
Bit no. Master -> AP09
7 bit=1: program value
bit=0: read out value
6 - 5 command number:
00: target value
01: calibration value
10: display after one turn
11: status / single bits (with this
command number the data bits
have a different significance!)
4 - 0 AP09's address
Bit no. AP09 -> Master
7 bit=1: check sum error
bit=0: check sum ok
6 - 5 command number:
00: positional value
01: calibration value
10: display after one turn
11: status / single bits (with this
command number the data bits
have a different significance!)
4 - 0 AP09's address
2 . Data bytes
Data bytes include numerical values for pro-
gramming / interrogating the different parame-
ters (positional-, calibration-, display- and target
values). These are displayed hexadecimally.
Value 1000 is for example displayed as follows: