Application Layer Specifications - YASKAWA Varispeed F7 User Manual

5.4

Application Layer Specifications

The data format for the application layer conforms to the MECHATROLINK-II link com-
mand specifications. The SI-T has the following main commands and sub-commands.
NOP
PRM_RD
PRM_WR
ID_RD
CONFIG
ALM_RD
ALM_CLR
CONNECT
DISCONNECT
INV_CTL
SYNC_SET
NOP
PRM_RD
PRM_WR
ALM_RD
INV_I/O
The main commands are used in both the 17-byte and 32-byte data transmissions for
MECHATROLINK-II and with MECHATROLINK-I. The sub-commands can be used only
when the 32-byte data transmission has been selected by means of pin 2 on DIP switch S1. If
a conflict occurs between a request for a main command and a request for a sub-command,
the request for the main command is processed. If either a main command or a sub-com-
mand is already being processed, the command being processed is given priority. If an
INV_CTL main command and an INV_I/O sub-command conflict, the sub-command over-
writes the main command.
For details on command formats, refer to Chapter 7 MECHATROLINK-II Commands.
Table 1 Main Commands
Name
No Operation
Reads Parameters.
Writes Parameters.
Reads ID numbers.
RAM Write ENTER_CODE and EEPROM Write
ENTER_CODE
Reads fault and alarm.
Clears fault and alarm.
Connect
Disconnect
Controls Inverter Operation.
Starts Synchronous Communications.
Table 2 Sub-commands
Name
No operation
Reads Parameters.
Writes Parameters.
Reads fault and alarm.
Controls Inverter I/O.
21
5 Transmission Interface
Function
Function