Bypass Status Word Bit Examples - Trane TR200 Operating Instructions Manual

Bit
0 Test ModeThe Test Mode bit will be true when the ECB is in Test Mode.
1 Drive ModeThe Drive Mode bit will be true when the ECB is in Drive Mode.
2 Automatic Bypass ModeThe Automatic Bypass Mode bit will be true when the ECB is in Auto-
matic Bypass Mode.
3 Bypass ModeThe Bypass Mode bit will be true when the ECB is in Bypass Mode.
4 ReservedThis bit is reserved for future use.
5 Motor Running from Bypass/DriveThe Motor Running from Bypass/Drive Bit will be true when
the motor is running from either the drive or the bypass.
6 Overload TripThe Overload Trip Bit will be true when the ECB detects an overload trip.
7 M2 Contactor FaultThe Contactor Fault Bit will be true when an M2 Contactor Fault is detected.
8 M3 Contactor FaultThe Contactor Fault Bit will be true when an M3 Contactor Fault is detected.
9 External InterlockThe External Interlock Bit will be true when an External Interlock fault is de-
tected.
10 Manual Bypass OverrideThe Manual Bypass Override Bit will be true when the Manual Bypass
Override input is true.
Table 6.8

Bypass Status Word Bit Examples

1. Motor running and bypass in drive mode. Status word 22 hexadecimal converts to 00000100010 binary.
Bit 10 9
Binary 0 0
Table 6.9
1. External interlock fault (open) and bypass in bypass mode. Status word 208 hexadecimal converts to
01000001000 binary.
Bit 10 9
Binary 0 1
Table 6.10
ECB Auto Bypass
General Information
Auto bypass allows a fault condition in the drive to activate running the motor in bypass without operator
intervention. Activation of the function is through setting timer start parameters in the drive programming. Fault
trip and running in bypass are reported through the drive display, digital outputs, and serial communications.
In addition, the independently powered ECB card is available to report bypass status when the drive is inoperable
(control card operative) through its serial communications or digital outputs.
Prior to Enabling Auto Bypass
• Complete the start-up procedure to verify motor rotation direction in bypass is correct and that the
system is ready in all respects for continuous full speed operation in bypass.
Operation
• With the auto bypass function enabled, a fault signal from the drive activates the auto bypass timer.
• If the fault clears before the time delay is complete, the motor remains operating in drive mode. This
allows temporary faults, such as a momentary under or over voltage, to clear without transferring
the system to bypass.
TR200 Option Panel Operating Instructions
Electronically Controlled Bypass (ECB) Oper-
8 7 6
0 0 0
8 7 6
0 0 0
Description
5 4 3
1 0 0
5 4 3
0 0 1
ation
2 1 0
0 1 0
2 1 0
0 0 0
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