Trane Vertical Bypass/Non Bypass Panel Mode of Operation Select, Par. No, Selection, Function

Electronically Controlled Bypass (ECB) Opera- tion

•Auto bypass mode: When in drive mode, auto bypass is a timed interval that allows a fault condition in the drive to activate running the motor in bypass without operator intervention.

Mode of Operation Select

•Mode of operation is programmed through parameter group 31-** . See Table 6.4.

Par. No.	Selection	Function
31-00	Bypass Mode	Selects source of motor power.
		(0) Drive (drive mode) (1) Bypass (bypass
		mode)
31-01	Bypass Start Time Delay	Sets a delay time for starting in bypass that
		allows for external actions to take place prior
		to line starting the motor.
		0-60 sec. (default value is 5 sec.)
31-02	Bypass Trip Time Delay	Setting a value other than 0 sec. enables
		auto bypass. Bypass trip delay sets the delay
		time before switching to bypass mode when
		the drive has a fault.
		0-300 sec. (default is 0 sec. = OFF)
31-03	Test Mode Activation	Setting enabled puts bypass in test mode.
		See the manual for warnings and cautions.
		(0) disabled (default value) (1) enabled
31-10	Bypass Status Word	Read-only display, which shows the bypass
		status in hex. See the next table for details.
		0, 216-1 (default value is 0)
31-11	Bypass Running Hours	Read only display which shows bypass
		running hours.

Table 6.4 Bypass Parameter Functions

Bit	Description
0	Test Mode The Test Mode bit will be true when the ECB is in Test Mode.
1	Drive Mode The Drive Mode bit will be true when the ECB is in Drive Mode.
2	Automatic Bypass Mode The Automatic Bypass Mode bit will be true when the ECB is in Automatic Bypass Mode.
3	Bypass Mode The Bypass Mode bit will be true when the ECB is in Bypass Mode.
4	Reserved This bit is reserved for future use.
5	Motor Running from Bypass/Drive The Motor Running from Bypass/Drive Bit will be true when the motor is running from
	either the drive or the bypass.
6	Overload Trip The Overload Trip Bit will be true when the ECB detects an overload trip.
7	M2 Contactor Fault The Contactor Fault Bit will be true when an M2 Contactor Fault is detected.
8	M3 Contactor Fault The Contactor Fault Bit will be true when an M3 Contactor Fault is detected.
9	External Interlock The External Interlock Bit will be true when an External Interlock fault is detected.
10	Manual Bypass Override The Manual Bypass Override Bit will be true when the Manual Bypass Override input is true.

Table 6.5 Parameter 31-10 Bypass Status Word Bit Definitions

BAS-SVX49A-EN 6-9