YASKAWA HV600 Technical Reference page 699

Item
Interface
Communication parameter
Communication protocol
Number of possible units to connect
◆
Communication with the Controller
This section gives information about the settings for the termination resistor and how to connect to BACnet
communications.
■
Connect Communications Cable
Use this procedure to start communication between the controller and bypass.
1.
De-energize the bypass then connect the communications cable to the controller and the bypass. The bypass
uses terminal TB3 for serial communications.
Note:
Isolate the communications wiring from the main circuit wiring and other high-power wiring. Use shielded wires for the
communications wiring and connect cable sheaths as shown in "Wiring Diagram for More than One Bypass". Incorrect wiring
procedures could cause bypass malfunction because of electrical interference.
2.
Enable the termination resistor ONLY when the bypass is at the end of the communications network. Set DIP
switch S1 to the "ON" position to enable the termination resistor. Refer to "Set the Termination Resistor" for
more information.
3.
Energize the bypass.
4.
Use the keypad to set the necessary communications parameters H5-01 to H5-12.
• H5-01 [Drive Node Address]
• H5-02 [Communication Speed Selection]
• H5-04 [Stopping Method after Com Error]
• H5-05 [Comm Fault Detection Select]
• H5-08 [Communication Protocol Selection]
• H5-09 [CE Detection Time]
5.
Because communications parameters do not take effect immediately, either de-energize and re-energize the
bypass or set H5-20 = 1 [Communication Parameters Reload = Reload Now].
YASKAWA SIEPYAIH6B01A HV600 AC Drive Bypass Technical Reference
Table 10.2 BACnet Specifications
Master-Slave/Token-Passing (MS-TP)
RS-485
Communications speed: 9.6, 19.2, 38.4, 76.8 kbps
Data length: 8 bit (fixed)
Parity: even, odd, none
Stop Bit: 1 bit (fixed)
BACnet MS-TP
Maximum: 127 units for each MS-TP network segment depending on network conditions.
Figure 10.2 Communications Cable Connection Terminal (TB3)
10.3 BACnet Communications
Specifications
10
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