Toro Electronic Controller (Tec); Can- Bus Communications - Toro Reelmaster 5010- H Service Manual

Toro Electronic Controller (TEC)

Reelmaster 5010- H machines use a Toro Electronic
Controller (TEC) to manage machine electrical func-
tions. The controller is microprocessor controlled that
senses the condition of various switches and sensors
(inputs). The controller then directs electrical power to
control appropriate machine functions (outputs) based
on the input state. Communication between the TEC
controller, the InfoCenter Display, the cutting unit motors
and the motor/generator is provided by a CAN- bus sys-
tem. The status of inputs to the TEC controller as well as
outputs from the TEC controller can be monitored with
the InfoCenter Display.
The TEC controller is located behind the access panel
on the outside of the control arm (Fig. 2).
IMPORTANT: To prevent machine electrical system
damage while welding on the machine, disconnect
the battery cables from the batteries, disconnect the
wire harness connectors from the Toro Electronic
Controller and disconnect the terminal connector
from the alternator.

CAN- bus Communications

System communication between electrical components
on Reelmaster 5010- H machines is accomplished on
two (2) CAN- bus communication systems. These
CAN- bus systems reduce the number of electrical com-
ponents and connections used on the machine and al-
low the number of wires in the wire harness to be
reduced. The integration of machine electrical functions
also allows the InfoCenter Display to assist with electri-
cal system diagnostics.
One of these CAN- bus systems allows TEC controller
communication between machine 12 VDC components
(e.g. engine components, InfoCenter display). The sec-
ond CAN- bus system provides necessary control for
the electric cutting reels system (motor/generator, cut-
ting reel motors). An isolation module is included in the
machine electrical system to allow communication be-
tween the two systems while maintaining ground isola-
tion for the 48 VDC system.
Reelmaster 5010- H
2
1. Control arm
CAN identifies the Controller Area Networks that is used
on the Reelmaster. Two (2) specially designed, twisted
wires form the bus for both of the networks used on the
Hybrid machines. These wires provide the data path-
ways between machine components. The engineering
term for these two (2) wires are CAN- high and CAN-
low. At the ends of the twisted pair of bus wires are 120
ohm termination resistors. The bus wires for the 12 VDC
circuits are black/white and red/white and the bus wires
for the 48 VDC circuits are green and yellow.
Each of the components that is controlled by the CAN-
bus link needs only four (4) wires to operate and commu-
nicate to the system: CAN High, CAN Low, B+ (power)
and ground. The CAN- bus needs the ignition switch ON
input for the TEC, InfoCenter Display, motor/generator
and cutting unit motors to be activated.
IMPORTANT: The termination resistors at the ends
of the bus wires are required for proper electrical
system operation.
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Figure 2
2. TEC controller
Electrical System
1