Manitowoc 2250 Service Maintenance Manual

Reference Only
INTRODUCTION 2250 SERVICE/MAINTENANCE MANUAL
1-30
Published 07-19-16, Control # 249-01
EPIC
®
Programmable Controller (PC)
See Figure 1-15 for the following.
The Model 2250 crane’s boom, load lines, swing, crawler
tracks, and accessory components are controlled
electronically with the electronically-processed independent
controls (EPIC) system. This simplifies the crane's electrical
control system by avoiding mechanical control switches and
relays. Standard or custom programming allows the
programmable controller (PC) to automatically adjust each
operational mode's acceleration rate and speed, apply the
brakes, and engage the clutches.
The PC receives and sends both analog and digital input/
output voltages. Analog input/output voltages are either AC
or DC variable voltages or currents that are in a pulse train.
Digital input/output voltages are 12 V nominal voltages that
are either 0 = OFF or 1 = ON.
The PC uses the binary system. The binary system is based
on binary multiples of two and only recognizes 0 = OFF or 1
= ON. Basic counts of this system are exponents of the
number two. These exponents are formed in words, called
bytes, of eight numbers each. The eight numbers are 1, 2, 4,
8, 16, 32, 64, and 128 for an 8-bit controller or a combination
of up to 255 bytes. These bytes represent electrical inputs/
outputs to the controller.
The controller processes the information by comparing it to
programming requirement and data information. The PC
then provides appropriate output commands to the crane’s
control devices. See Troubleshooting
Section 10.
Digital Display
The digital display screen on the front console shows
operating conditions, operating limits, and system faults
monitored by the PC. Access information by scrolling to the
desired display screen with the scroll switch. System
messages are shown in Tables in Digital Display Readings in
Section 3 of the Operator Manual.
Rated Capacity Indicator/Limiter (RCI/RCL)
The rated capacity indicator/limiter (RCL) system has its own
PC and is part of the EPIC system. Load charts are specific
for each crane’s model. For complete information see the
separate Rated Capacity Indicator/Limiter Operation
Manual.
Crane Modes
• Standard mode is for all normal load-handling
operations.
• In Setup mode, the program allows limited operation, but
the boom-up limit is bypassed.
• In Luffing Jib mode, the program allows Standard mode
load handling operations plus luffing jib operation.
• In Tandem Drum mode, the program allows operation of
both load drums on a split drum shaft, or both front and
rear load drums are operated at the same time in full
power operation with a single control handle.
RF-08
Command Voltages In
Monitoring
Voltages Out
Brakes
Digital Display
Voltages
To
Counts
To
Voltages
Memory
Processing
Programmable
Controller - PC
Sensor Voltages In
Motor Speed Sensor (if clutch equipped)
Pressure
Senders
Operational Voltages Out
Pumps
EDC
Brake
Valve
Drum
Speed
Senders
Motors
Clutch
If
Equipped
Drums
Selectors
Control
Handles
Switches
Limit
Switches
Gear
Reducer
PCP
B
r
a
k
e
FIGURE 1-15

Manitowoc 2250 Specifications

General

Brand	Manitowoc
Model	2250
Category	Construction Equipment
Language	English