YASKAWA HV600 Technical Reference page 713

BACnet Object
BV55 (Write "ON")
BV56 (Write "ON")
Note:
You can write the EEPROM to the drive a maximum of 100,000 times. Do not frequently execute the Enter command (0900 (Hex.)) that is
written to EEPROM. The Enter command registers 0900 (Hex.) and 0910 (Hex.) are write-only. If these registers are read, the register
address will not be applicable, but BACnet objects BV55 and BV56 can be read without error.
◆
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
Table 10.6 Types of Enter Commands
Modbus Address
(Hex.)
This updates the data on the RAM, but does not write data to the EEPROM.
0910 (Write 0)
This process saves the parameter changes until you de-energize the drive.
When you write parameter data to the EEPROM, you will enable the data on the RAM at the same time.
0900 (Write 0)
This process saves the parameter changes until you de-energize the drive.
Figure 10.5 Self-Diagnostics Jumper Terminals
10.3 BACnet Communications
Description
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