Network Communications
6
6.3 MEMOBUS/Modbus Communications
YASKAWA SIEPC71061737D GA800 Drive Technical Reference 325
H5-11 Settings H5-11 = 0 H5-11 = 1
Upper and lower limit check
Checks the upper and lower limits and considers the related
parameter settings.
Checks the upper and lower limit of the changed parameter
only.
Default setting of related parameters
Will not change related parameter settings. You must
change the parameters manually.
Automatically changes the default settings for the related
parameters.
Fault detection when you set more than one parameter
Accepts and responds as usual to correct setting data if the
data contains parameter setting errors. The drive discards
the disabled setting data, but will not return an error
message.
If there is a setting error in a parameter, the drive responds
with a fault. The drive discards the data that was sent.
◆ Self-Diagnostics
The drive can use Self-Diagnositcs to find the operation of the serial communications interface circuit. Self-
Diagnostics connects the transmission terminal to the reception terminal on the control circuit. It then transmits the
data sent by the drive and makes sure that the drive can communicate correctly.
Use this procedure to do Self-Diagnostics:
1. Energize the drive.
2. Set H1-06 = 67 [Terminal S6 Function Select = Communications test mode].
3. De-energize the drive.
4. Connect a jumper between control circuit terminals S6 and SN.
Make sure terminal SC and terminal SP are connected by a wire jumper.
Figure 6.8 Self-Diagnostics Jumper Terminals
5. Energize the drive.
6. When normal, the keypad will show PASS [MEMOBUS/Modbus Communications Test Mode Normal].
When there is an error, the keypad will show CE [MEMOBUS/Modbus Communications Error].
7. De-energize the drive.
8. Disconnect the wire jumper between terminals S6 and SN. Set terminal S6 to its initial function.
Self-Diagnostics is complete and the drive returns to its usual function.
◆ Communications Data Table
Command Data on page 325, Monitor Data on page 329, and Broadcast Messages on page 344 show the
communications data. The data types are command data, monitor data, and broadcast message.
Refer to the Parameter List for parameter communications registers.
■ Command Data
You can read and write command data.
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