Regenerative Brake Selection - Mitsubishi Electric 800 Series Instruction Manual

15.8

Regenerative brake selection

• When performing frequent start and stop operation, usage rate of the regenerative brake can be increased by using the
optional high-duty brake resistor (FR-ABR) or the brake unit (FR-BU2, BU, or FR-BU).
• The multifunction regeneration converter (FR-XC in power regeneration mode) or power regeneration common converter
(FR-CV) is used for the continuous operation in the regenerative status. The multifunction regeneration converter (FR-XC
in common bus regeneration mode) and high power factor converter (FR-HC2) can also be used to reduce harmonics,
improve power factor, and operate continuously during regenerative driving.
Pr.
30 Regenerative function
E300 selection
70
Special regenerative brake duty 0%
G107
17 MRS/X10 terminal input
T720 selection
 When using the brake resistor (MRS, MYS type), brake unit (FR-BU2),
multifunction regeneration converter (FR-XC), power regeneration
common converter (FR-CV), and high power factor converter (FR-HC2)
• Set Pr.30 = "0" (initial setting). The Pr.70 setting is invalid. At this time, the regenerative brake duty is as follows.
FR-E820-0008(0.1K), FR-E820-0015(0.2K)
FR-E820-0030(0.4K) to FR-E820-0175(3.7K)
FR-E820-0240(5.5K), FR-E820-0330(7.5K)
FR-E840-0016(0.4K) to FR-E840-0170(7.5K)
• When connecting the converter unit (FR-XC, FR-HC2, or FR-CV), assign the Inverter run enable (X10) signal to a contact
input terminal. To ensure coordinated protection of the converter unit, use the Inverter operation enable (X10) signal to
shut off the inverter output. Input the Inverter operation enable (RYB/RDY/RDYB) signal of the converter unit. The X10
signal can be input only via an external input terminal. For the terminal used for the X10 signal input, set "10" (X10) in any
parameter from Pr.178 to Pr.184 to assign the function.
 When using the brake resistor (MYS type) used at 100% torque, 6%ED
(FR-E820-0175(3.7K) only)
• Set Pr.30 = "1".
• Set Pr.70 = "6%".
386
15. (G) Control Parameters
15.8 Regenerative brake selection
Initial
Name
value
0
0
Inverter
Setting range
No regenerative function
Brake resistor (MRS, MYS type)
Brake unit (FR-BU2)
0
Multifunction regeneration converter (FR-XC)
Power regeneration common converter (FR-CV)
High power factor converter (FR-HC2)
Brake resistor (MYS type) used at 100% torque, 6%ED
1
High-duty brake resistor (FR-ABR)
When the automatic restart operation after instantaneous
2 power failure function is enabled while a brake resistor and a
regeneration unit is used
0% to 100% Set the %ED of the built-in brake transistor operation.
0 X10: Normally open input
X10: Normally closed input
1 (NC contact input
specification)
2 X10: Normally open input
X10: Normally closed input
3 (NC contact input
specification)
4 X10: Normally open input
X10: Normally closed input
5 (NC contact input
specification)
Regenerative brake duty
0%
3%
2%
Description
MRS: Normally open input
MRS: Normally closed input
(NC contact input
specification)
External terminal: Normally
closed input (NC contact input
specification)
Communication: Normally
open input