3 word i/os message, Fast i/o output data, Network communications 3-10 – Yaskawa V7 PROFIBUS-DP User Manual
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Network Communications 3-10
3 Word I/Os Message
The 3 word I/Os messages have only one fixed area. This is the most frequently used data and is referred to as the fast I/O data. 6 Byte
messages are used when processor memory is a critical factor in the network design. As shown below the 3 word I/Os message contains
only the minimum drive data.
Table 3.12 – V7 PROFIBUS-DP 3 Word Message I/O Table
OUTPUT DATA PROFIBUS-DP Master -> V7
INPUT DATA V7 -> PROFIBUS-DP Master
Byte
Function
Byte
Function
0
RUN Operation Command MSB
0
Drive Status MSB
1
RUN Operation Command LSB
1
Drive Status LSB
2
Frequency Reference MSB
2
Frequency Reference MSB
3
Frequency Reference LSB
3
Frequency Reference LSB
4
Torque Reference MSB
4
Torque Reference MSB
Fast I/
O
5 Torque
Reference
LSB
Fast I/
O
5 Torque
Reference
LSB
Fast I/O Output Data
The fast I/O output data area is used to transfer parameter data directly to the drive via a dual port RAM interface. The following table
details the functions of the fast I/O output data (Bytes 0 to 5) For detailed explanation of the terminal and multi-function inputs and outputs,
refer to the V7 Technical Manual.
Table 3.13 – 3 Word Message Fast I/O Output Data
Fast I/O Output Data (PROFIBUS-DP Master -> V7)
Byte
Function
Bit
Note
0
Fwd Run/Stop
1 = RUN Forward (Enabled when n003 is set to 3)
1
Rev Run/Stop
1 = RUN reverse (Enabled when n003 is set to 3)
2
Terminal S3
1 = Close (terminal function dependent on setting of parameter n052)
3
Terminal S4
1 = Close (terminal function dependent on setting of parameter n053)
4
Terminal S5
1 = Close (terminal function dependent on setting of parameter n054)
5
Terminal S6
1 = Close (terminal function dependent on setting of parameter n055)
6
Terminal S7
1 = Close (terminal function dependent on setting of parameter n056)
0
7 Reserved
8
External Fault
1 = External Error
9
Fault Reset
1 = Reset Fault
1
Command
Reference
Ah - Fh
Reserved
2
Frequency Reference MSB
3
Frequency
Reference
Frequency Reference LSB
1 = 0.01Hz or 1 = 1 RPM
scaling is dependent on the setting of parameter n035
4 Torque
Reference
MSB
5
Torque
Reference
Torque Reference LSB
0 – 100%