Programming examples
70
FTC470XDP_D00111_00_M_XXEN/02.2015
7.6.2
Requesting a device type after taking over the Master function by FTC470XDP
The following example shows the Master takeover, the subsequent interrogation and Master return.
In this example it is assumed that BMS address 2 is assigned to FTC470XDP 2. By assigning BMS ad-
dress 1 to the FTC470XDP, it would anyway have the Master function.
Requesting the device type (EDS470)
The insulation fault evaluator EDS470-12 with address 5 is to be interrogated. For that purpose, at
first the protocol converter FTC470XDP with address 2 must take over the Master function
(output data):
The Master function is acknowledged
(input data):
The PROFIBUS-Master interrogates the device type of EDS470-12 (output data):
The PROFIBUS Master reads the device type of EDS470-12
(input data):
The PROFIBUS Master instructs the FTC470XDP to return the Master function to the initial Master
(output data):
The return of the Master function is acknowledged
(input data):
Byte 1
Byte 2
Byte 3
Byte 4
Byte 5
Byte 6
Byte 7
Byte 8
Consecutive
PROFIBUS ID
No.
always
"0"
BMS address of
the addressed
device
BMS channel
number
BMS
Com-
mand
BMS data
type
High byte
BMS data
value
Low byte
BMS data
value
1
0
2
0
112
2
0
0
Byte 1
Byte 2
Byte 3
Byte 4
Byte 5
Byte 6
Byte 7
Byte 8
1
0
2
0
112
2
0
0
Byte 1
Byte 2
Byte 3
Byte 4
Byte 5
Byte 6
Byte 7
Byte 8
2
0
5
0
20
0
0
0
Byte 1
Byte 2
Byte 3
Byte 4
Byte 5
Byte 6
Byte 7
Byte 8
2
0
5
0
20
1
0
12
Byte 1
Byte 2
Byte 3
Byte 4
Byte 5
Byte 6
Byte 7
Byte 8
3
0
2
0
112
101
0
0
Byte 1
Byte 2
Byte 3
Byte 4
Byte 5
Byte 6
Byte 7
Byte 8
3
0
2
0
112
101
0
0
