YASKAWA HV600 Technical Reference page 737

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Writing to a Parameter
Two points are defined for writing to parameters:
• AO 31 - Specifies the parameter to be written to
• AO 32 - Entry location of the value to be written to the parameter specified in AO 31. When this point is written to,
it will write the value to the bypass. An ENTER or ACCEPT command does not need to be sent for the data to be
taken by the bypass. The behavior of the write is the same as with the keypad. If the bypass is running, there are a
limited number of parameters that can be written to.
Example: Writing a value of 387 (183 hex) to AO 31 specifies parameter b1-04. Writing a value of 1 to AO 32 sets
b1-04 = 1 and enables the bypass for reverse run.
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Self-Diagnostics
The bypass can use Self-Diagnostics to verify the hardware transceiver on the control circuit. Self-Diagnostics
connects the transmission terminal to the reception terminal on the control circuit and transmits the data to itself to
makes sure that the bypass can communicate correctly.
Use this procedure to do Self-Diagnostics:
DANGER! Electrical Shock Hazard. Do not examine, connect, or disconnect wiring on an energized bypass. Before servicing,
disconnect all power to the equipment and wait for the time specified on the warning label at a minimum. The internal capacitor
stays charged after the bypass is de-energized. The charge indicator LED extinguishes when the DC bus voltage decreases below
50 Vdc. When all indicators are OFF, remove the covers before measuring for dangerous voltages to make sure that the bypass is
safe. If you do work on the bypass when it is energized, it will cause serious injury or death from electrical shock.
1.
Energize the bypass.
2.
Set Z2-06 = 45 [Digital Input 6 Function (TB2-6) - Serial Hardware Test (RS-485)].
3.
De-energize the bypass.
4.
Connect a jumper between control circuit terminals TB2-6 and TB2-9 or TB2-10.
5.
Energize the bypass.
6.
When normal, the keypad will show PASS [Serial Communication Test].
Note:
If there is an error, the keypad will show CE [Serial Communication Error]. Disconnect the bypass from the network and test the
bypass again. If the error stays, there is a possible hardware problem. If there is no error, there is a possible network wiring
problem.
7.
De-energize the bypass.
8.
Disconnect the jumper from Step 4. Set Z2-06 to its initial function.
Self-Diagnostics is complete and the bypass returns to its usual function.
YASKAWA SIEPYAIH6B01A HV600 AC Drive Bypass Technical Reference
Figure 10.16 Self-Diagnostics Jumper Terminals
10.5 Metasys N2 Communications
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