Toshiba G7 - Manual (Page 53)

G7 ASD Multi-Protocol Communication Option and PG Feedback Option Manual 46
11.2 Unit Addressing
The DeviceNet node (slave) address is set via parameter F802 (inverter number parameter). Although
parameter F802 has an adjustment range from 0-255, only 0-63 is an allowable addressing selection for
the DeviceNet network. Therefore, if parameter F802 is set to 64 through 255, the Network Status LED
will light solid red upon initialization to indicate the configuration error. Correct the inverter number
parameter setting and reset the drive to remove the error.
11.3 Grounding
Grounding is of particular importance for reliable, stable operation. Communication system
characteristics may vary from system to system, depending on the system environment and grounding
method used. In general, however, the following grounding checkpoints should be noted when
connecting any communications system to adjustable speed drives:
Grounding method checkpoints
1. Make all ground connections such that no ground current flows through the case or heatsink of a
connected drive.
2. Do not connect the DeviceNet network SHIELD to a power ground or any other potential noise-
producing ground connection (such as a drive’s “G/E” terminal).
3. Do not make connections to unstable grounds (paint-coated screw heads, grounds that are subjected
to inductive noise, etc.)
For specific requirements regarding protective grounding and the DeviceNet network, refer to the
ODVA DeviceNet Specifications.
11.4 Connection Information
11.4.1 Connection Sizes
Connection Instance Produced Consumed
Polled I/O (Toshiba assembly) 8 bytes 8 bytes
Polled I/O (AC/DC drive profile) 4 bytes 4 bytes
Explicit Messaging 29 bytes 29 bytes
Notes
• For the Explicit Messaging connection, this is the maximum message length: shorter messages
are also acceptable.
• For the Polled I/O connection, if the actual consumed data size is less than the connection
instance’s consumed_connection_size attribute, the consumed data will be ignored, but the
connection will otherwise produce normally. If the actual consumed data size is larger than the
connection instance’s consumed_connection_size attribute, the consumed data will be ignored
and the connection will not produce.