This document describes the control functions for an X1 option on an EC380D excavator. It details the input and output signals for controlling hammering and shearing actions through various control methods, including single or double acting with one or two switches, proportional control with a proportional switch, and flow control. Control is achieved by activating specific solenoids and proportional valves based on input signals from switches, sensors, and software parameters. Flow control can utilize one or two pumps depending on the required flow level.

1. X1 control, description
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Valid for serial numbers
Model Production site Serial number start Serial number stop
EC380D HR Volvo
This is for X1 option attachment control. The function controls X1 option applications which are hammer and shear.
Input signal
Pin No. ECU Description
VB01 V-ECU Boost / Hammer switch
VA03 V-ECU X1 switch, left-hand
VA28 V-ECU X1 switch, right-hand
VB03 V-ECU X1 proportional switch
VA66 V-ECU Pressure monitor, hammer or shear (X1), SE9112
VA20 V-ECU Control lockout lever, SW9118
Output signal
Pin No. ECU Description
VA06 V-ECU X1 proportional valve 1, PWM9123
X1 left solenoid (hammer), MA9121
VA55 V-ECU X1 proportional valve 2, PWM9124
X1 right solenoid, MA9122
VA56 V-ECU X1 main flow control proportional valve, PWM9109
VA13 V-ECU 1/2 pump select solenoid, MA9116
VA64 V-ECU Hammer select solenoid, MA9117
VA65 V-ECU Shear select solenoid, MA9118
VA01 V-ECU left-hand X1 flow preset proportional valve, PWM9129
VA24 V-ECU Right-hand X1 flow preset proportional valve, PWM9130
Following tables describe how the function controls X1 application depending on single and double acting with 1
switch, 2 switch, proportional switch and pedal.
For the X1 set values, see Software parameters, description.
1 switch control and single acting
This function describes a single acting with 1 switch control.
Input signals Condition for output functions Output functions

2. ¡
¡
¡
¡
¡
VCADS Pro parameter
IIN, 1 button RCV control
lever
VCADS Pro parameter
FYW, X1 1way switch
VCADS Pro parameter
HNI, X1 single acting
Hammer / shear selection
button on keypad
SW9118, control lockout
lever
¡
¡
¡
¡
¡
VCADS Pro parameter IIN, FYW,
HNI “ON”
Hammer / shear selection button
“ON”
Control lockout lever “ON”
Select 1–way on the I-ECU
1 button control lever, switch “ON”
X1 left solenoid (hammer),
MA9121 “ON”
2 switch control and double acting
This function describes a double acting with 2 switch control.
Input signals Condition for output functions Output functions
¡
¡
¡
VCADS Pro parameter IIO, CVS
“ON”
Hammer / shear selection button
“ON”
Control lockout lever“ON”
¡
¡
¡
¡
¡
VCADS Pro parameter IIO
4 button RCV control lever
VCADS Pro parameter
CVS, X1 2way switch
X1 selection switch
SW9118, control lockout
lever
1–way or 2–way on the
IECU
¡ Select 1–way on the I-ECU ¡ MA9117, hammer select
solenoid “ON”
¡
¡
MA9117, hammer select solenoid
“ON”
Control lever hammer switch “ON”
¡ X1 left solenoid (hammer),
MA9121 “ON”
¡ Select 2–way on the I-ECU ¡ MA9118, shear select
solenoid “ON”
¡
¡
MA9118, shear select solenoid
“ON”
Control lever LH, RH switch “ON”
¡ MA9121/MA9122 “ON”
1 switch control and pedal
This function describes 1 switch control with pedal on a double acting. In case of single acting, there exists only
MA9117, hammer selection solenoid with X1 pedal.
Input signals Condition for output functions Output functions
¡
¡
¡
VCADS Pro parameter FYW, HOJ
“ON”
Hammer / shear selection button
“ON”
Control lockout lever “ON”
¡
¡
VCADS Pro parameter
FYW, 1 way switch
VCADS Pro parameter
HOJ, X1 pedal
¡ 1–way or 2–way on the

3. ¡
¡
IECU
X1 selection switch
SW9118, control lockout
lever
¡ Select 1–way on the I-ECU ¡ MA9117, hammer select
solenoid “ON”
¡
¡
MA9117, hammer select solenoid
“ON”
1 button control lever, switch “ON”
¡ MA9121, X1 left solenoid
(hammer) “ON”
¡
¡
MA9117, hammer select solenoid
“ON”
Pedal “Forward”
¡ Hammering
¡ Select 2–way on the I-ECU ¡ MA9118, shear select
solenoid “ON”
¡
¡
MA9118, shear select solenoid
“ON”
1 button control lever, switch “ON”
¡ MA9121, X1 left solenoid
(hammer) “ON”
¡
¡
MA9118, shear select solenoid
“ON”
Pedal “Forward”
¡ Shear moves.
¡
¡
MA9118, shear select solenoid
“ON”
Pedal “Reverse”
¡ Shear moves opposite
direction.
Proportional control
This function describes proportional control with proportional switch. If the parameter set value FYV, proportional
control, is “0”, V-ECU convert proportional signal to ON/OFF signals to control hammer/shear solenoid.
Input signals Condition for output functions Output functions
¡
¡
¡
VCADS Pro parameter IKM, FYV
“ON”
Hammer/shear selection button
“ON”
Control lockout lever “ON”
¡
¡
VCADS Pro parameter
IKM, proportional control
lever
VCADS Pro parameter
FYV, proportional control
¡
¡
¡
1–way or 2–way on the
IECU
X1 selection switch
SW9118, control lockout
lever
¡ Select 1–way on the I-ECU ¡ MA9117, hammer select
solenoid “ON”
¡
¡
MA9117, hammer select solenoid
“ON”
Proportional switch slide “left”
¡ PWM9123, X1
proportional valve 1 “ON”

4. ¡ Select 2–way on the I-ECU ¡ MA9118, shear select
solenoid “ON”
¡
¡
MA9118, shear select solenoid
“ON”
Proportional switch slide “left”
¡ PWM9123, X1
proportional valve 1 “ON”
¡
¡
MA9118, shear select solenoid
“ON”
Proportional switch slide “right”
¡ PWM9124, X1
proportional valve 2 “ON”
Flow control
Input signals Condition for output functions Output functions
¡
¡
VCADS Pro parameter BFJ, “ON”
VCADS Pro parameter HOI,
“OFF”
¡ 1 pump control
¡
¡
VCADS Pro parameter
BFJ, flow control
VCADS Pro parameter
HOI, 2–pump flow
¡
¡
¡
SE9112, Hammer pilot pressure
sensor “ON”
Comparison between set flow (I-
ECU) and X1 flow maximum + X1
flow minimum
If X1 set flow < X1 flow maximum
and X1 flow minimum, V-ECU
calculate current on the
proportional valve according to the
set flow on the I-EUC.
¡
¡
MA9116, 1/2 pump select
solenoid “OFF”
PWM9109, X1 main flow
control proportional valve
“ON”
¡
¡
VCADS Pro parameter BFJ, “ON”
VCADS Pro parameter HOI, “ON”
¡ 2 pump control
¡
¡
¡
SE9112, Hammer pilot pressure
sensor “ON”
Comparison between set flow (I-
ECU) and X1 flow maximum + X1
flow minimum
If X1 set flow > X1 flow maximum
and X1 flow minimum, the current
on the proportional valve will be
decided according to modified flow
value, X1' : X1 set flow on the I-
ECU – 1 flow maximum (1 pump
max.)
¡
¡
¡
MA9116, 1/2 pump select
solenoid “ON”
PWM9109, X1 main flow
control proportional valve
“ON”
Pump 1 displacement will
be decided according to
X1'.
Pump 2 displacement will
be maximum.