Table of Contents
Advertisement
Figure 6-7
Information about the S7 program
The hexadecimal numeric value 047E is written to control word 1. The bits of control word 1
are listed in the following table.
Table 6- 18
HEX
E
7
4
0
In this example, inputs E0.0 and E0.6 are linked to the -bit ON/OFF1 or to the "acknowledge
fault" bit of STW 1.
The hexadecimal numeric value 2500 specifies the setpoint frequency of the inverter. The
maximum frequency is the hexadecimal value 4000 (also see Data exchange via the fieldbus
(Page 103)).
The control cyclically writes the process data to logical address 256 of the inverter. The
inverter also writes its process data to logical address 256. You define the address area in
HW Config, seeInserting the inverter into the STEP 7 project (Page 109).
Inverter with CU240B-2 and CU240E-2 Control Units
Operating Instructions, 07/2010, FW 4.3.2, A5E02299792B AA
Status evaluation of the inverter via PROFIBUS
Assignment of the control bits in the inverter to the SIMATIC flags and inputs
BIN
Bit in
Significance
STW1
0
0
ON/OFF1
1
1
ON/OFF2
1
2
ON/OFF3
1
3
Operation enable
1
4
Ramp-function generator enable
1
5
Start ramp-function generator
1
6
Setpoint enable
0
7
Acknowledge fault
0
8
Jog 1
0
9
Jog 2
1
10
PLC control
0
11
Setpoint inversion
0
12
Irrelevant
0
13
Motorized potentiometer ↑
0
14
Motorized potentiometer ↓
0
15
Data set changeover
Connection to a fieldbus
6.3 Communication via PROFIBUS
Bit in
Bit in
Bit in
MW1
MB1
MB2
8
0
9
1
10
2
11
3
12
4
13
5
14
6
15
7
0
0
1
1
2
2
3
3
4
4
5
5
6
6
7
7
Inputs
E0.0
E0.6
125
Hide quick links:
Advertisement
Table of Contents
