SI-INTERBUS User Guide
37
Issue Number: 1
Sa
fety
Introd
Sup
Mec
El
G
A
Non
Vi
S
Contr
Di
S
F
CM
D tool
Glo
ssa
Request
Data word = 0x9102
Stamp Number = 1
Menu = 2
When the first telegram has been received and processed in the slave node, it is
mirrored in the non-cyclic IN word back to the Interbus master controller. This is the
signal to the master controller program that the first telegram of the message has been
received and understood, the second telegram can now be transmitted.
Response
Data word = 0x9102
Stamp Number = 1
Menu = 2
Telegram 2
The second telegram from the Interbus master controller also indicates a READ cycle
but the stamp number is now 2.
The data byte contains the parameter number of the parameter that is to be read.
Request
Data word = 0x9201
Stamp Number = 2
Parameter = 1
When the second telegram has been received and processed in the slave node, it is
mirrored in the non-cyclic IN word back to the Interbus master controller. This is the
signal to the master controller program that the second telegram of the message has
been received and understood, the third telegram can now be transmitted.
Response
Data word = 0x9201
Stamp Number = 2
Parameter = 1
Telegram 3
The third telegram from the Interbus master controller acts as the indication to the slave
device to transmit the high data byte from the requested parameter. The data byte is not
used in this telegram and should be set to 0, the stamp number is now 3.
Request
Data word = 0x9300
Stamp Number = 3
Bit
b15 to b12
b11 to b8
b7 to b4
b3 to b0
Value
1001
0001
0000
0010
Bit
b15 to b12
b11 to b8
b7 to b4
b3 to b0
Value
1001
0001
0000
0010
Bit
b15 to b12
b11 to b8
b7 to b4
b3 to b0
Value
1001
0010
0000
0001
Bit
b15 to b12
b11 to b8
b7 to b4
b3 to b0
Value
1001
0010
0000
0001
Bit
b15 to b12
b11 to b8
b7 to b4
b3 to b0
Value
1001
0011
0000
0000