Yaskawa Profibus-DP Option Card CM061 Manuel d'utilisateur télécharger pdf (Page 49)

Parameter Access C-5

Read Drive Data Example

Table C.2 – Read Drive Data Example

PROFIBUS-DP Master Command Initialize Data Structures Drive Response

Function Code 00h Function Code 03h

Starting Address MSB 00h Starting Address MSB 01h

Starting Address LSB 00h Starting Address LSB 00h

Data Quantity 00h Data Quantity 02h

Data 1 MSB 00h Data 1 MSB 00h

Data 1 LSB 00h Data 1 LSB 00h

Handshaking (1000 0000) 80h

Set the command message handshake byte HS bit to the same state as the

response message handshake HS bit.

Handshaking (1110 0000) E0h

PROFIBUS-DP Master Command Set PROFIBUS-DP Master Command Message Drive Response

Function Code 03h Function Code 03h

Starting Address MSB 00h Starting Address MSB 01h

Starting Address LSB 37h Starting Address LSB 00h

Data Quantity 02h Data Quantity 02h

Data 1 MSB 00h Data 1 MSB 00h

Data 1 LSB 00h Data 1 LSB 00h

Handshaking (1000 0000) 80h

Set the Function Code, Starting Address, and Data Quantity. This

example configures the command message to retrieve data from drive

drive registers refer to the Technical Manual and the MODBUS



Technical Manual.

Handshaking (1110 0000) E0h

PROFIBUS-DP Master Command Toggle the PROFIBUS-DP Master Handshake Bit Drive Response

Function Code 03h Function Code

Starting Address MSB 00h Starting Address MSB

Starting Address LSB 37h Starting Address LSB

Data Quantity 02h Data Quantity

Data 1 MSB 00h Data 1 MSB

Data 1 LSB 00h Data 1 LSB

Handshaking (0000 0000) 00h

After the data bits have been set, toggle the HS bit, bit 7, of the command

handshake byte to signal the drive that the command message contains a

Parameter Access command. On receipt of the command message, the

HS bit, bit 7, of the response message handshake byte is set to the same

state as the HS bit of the command message handshake byte. As the

response message may contain invalid data, ignore all response message

data.

Handshaking (0000 0000) 00h

PROFIBUS-DP Master Command Wait for Response Drive Response

Function Code 03h Function Code

Starting Address MSB 00h Starting Address MSB

Starting Address LSB 37h Starting Address LSB

Data Quantity 02h Data Quantity

Data 1 MSB 00h Data 1 MSB

Data 1 LSB 00h Data 1 LSB

Handshaking (0000 0000) 00h

The PROFIBUS-DP Option formats the command message and transmits

it to the drive, setting bit 5 of the response handshake byte. As the

response message may contain invalid data, ignore all response message

data.

Handshaking (0010 0000) 20h

PROFIBUS-DP Master Command Wait for Response Drive Response

Function Code 03h Function Code

Starting Address MSB 00h Starting Address MSB

Starting Address LSB 37h Starting Address LSB

Data Quantity 02h Data Quantity

Data 1 MSB 00h Data 1 MSB

Data 1 LSB 00h Data 1 LSB

Handshaking (0000 0000) 00h

Bit 5 is reset and bit 6 set of the response handshake byte when the

message has been received by the drive and that the drive has begun

processing the message. As the response message may contain invalid

data, ignore all response message data.

Handshaking (0100 0000) 40h

PROFIBUS-DP Master Command Process Response Drive Response

Function Code 03h Function Code 03h

Starting Address MSB 00h Starting Address MSB 00h

Starting Address LSB 37h Starting Address LSB 37h

Data Quantity 02h Data Quantity 02h

Data 1 MSB 00h Data 1 MSB 00h

Data 1 LSB 00h Data 1 LSB 15h

Handshaking (0000 0000) 00h

Bits 5 and 6 of the response byte handshake are both set when the

processing has been completed and the response message contains valid

data.

Handshaking (0110 0000) 60h

1 2 ... 44 45 46 47 48 49 50 51 52 53 54 ... 67 68

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Yaskawa Profibus-DP Option Card CM061 Manuel d'utilisateur Page 49

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