4-77
4-2 Function Mode
4
Functions
Note 2: Even if this function is enabled, an overvoltage trip may occur depending on the deceleration rate and
load condition.
Note 3: When using this function, the Inverter may reduce frequency depending on the moment of inertia of motor
load, and takes a long time to stop.
*1.
If the b131 set value is lower than the incoming voltage or equivalent, the motor may not be stopped.
*2. When b130 = 01, PI control works to keep the internal DC voltage constant.
•Though quicker response is expected with a larger proportional gain (b133), control tends to be divergent
and may easily lead to a trip.
•Response also becomes quicker with a shorter integral time (b134), but if too short, the same situation may
occur.
<Group C: Multi-function Terminal Function>
The 3G3RX has eight input terminals [S1], [S2], [S3], [S4], [S5], [S6], [S7], and [S8]; five open col-
lector output terminals [P1], [P2], [P3], [P4], and [P5]; one relay output terminal [MA] and [MB] (SP-
DT contact); two analog output terminals [AM] and [AMI]; as well as one digital output terminal [MP].
Multi-function Input Selection
•You can use the following functions by allocating them to any of multi-function inputs S1 to S8.
To allocate the functions, set the following data in C001 to C008. For example, C001 corresponds
to input terminal S1.
•The same two functions cannot be allocated to the multi-function input terminals. If you attempt to
allocate the same two functions to the terminals by mistake, the terminal where you allocated the
function last takes precedence. The previous data is set to "no (no allocation)", and the terminal
function is disabled.
•After allocating functions to terminals S1 to S8, make sure that the function settings have been
stored.
Parameter
No.
Data Function name Reference item Page
C001 to
C008
01 RV : Reverse command RUN command
02 CF1 : Multi-step speed setting binary 1
Multi-step speed operation function 4-1603 CF2 : Multi-step speed setting binary 2
04 CF3 : Multi-step speed setting binary 3
05 CF4 : Multi-step speed setting binary 4 Multi-step speed operation function 4-16
06 JG : Jogging Jogging operation 4-18
07 DB : External DC injection braking
DC injection braking (external DC
injection braking)
4-24
08 SET : 2nd control 2nd/3rd control function 4-80
09 2CH : 2-step acceleration/deceleration
2-step acceleration/deceleration
function
4-37
11 FRS : Free-run stop Free-run stop 4-69
12 EXT : External trip External trip 4-82
13 USP : USP function
Power recovery restart prevention
function
4-82
14 CS : Commercial switch Commercial switch 4-83
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