Installation Manual

Electrical & Electronic Application And Installation Manual
Production Release Version 1.0
Page 250 12/16/2014
20.2.2 Torque Speed Control (TSC1) Message Configuration &
Control
The Torque/Speed control #1 (TSC1) PGN allows electronic control devices
connected to the CAN network to request or limit engine speed. This feature
is often used as part of a closed loop engine control system with broadcast
message parameters such as engine speed (EEC1). Usage is particularly
common in machines that have complex hydraulic systems.
Identifier Rate
(msec)
PGN Default
Priority
R1 DP Source Destination
0C 00 00 xx 10 000000 3 0 0 See
notes
00
S
e
n
d
R
e
c
e
i
v
e
Parameter name B
y
t
e
B
i
t
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S
t
a
t
e
U
n
i
t
s
Resolution
(unit/bit)
Range N
o
t
e
Min Max
X Override Control Mode (spn 695)
1 1 2
X
Override Disabled 00
X
Speed Control 01
X
Torque Control 10
X
Speed/Torque Limit Control 11
Requested Speed Control Conditions
(spn 696)
3 2
X
Override Control Mode Priority (spn
897)
5 2
A
X
Highest Priority 00 A
X
High Priority 01 A
X
Medium Priority 10 A
X
Low Priority 11 A
Not Defined 7..8
X
Requested Speed / Speed Limit (spn
898)
2 1 16
Rpm 0.125 0 8032
X
Requested Torque / Torque Limit (spn
518)
4 1 8
% 1 -125 +125 B
20.2.1.1 ECM Response Time To TSC1 Request
The mean response time for the ECM to alter the desired speed following a
TSC1 request is 52ms +/-5ms. Note, there will be a further delay in the
engine’s actual speed response due to the driving of mechanical components.
If TSC1 response time is critical to transmission development and operation,
contact your Electronic Applications Engineer.
20.2.1.2 TSC1 Configuration
TSC1 is always available as a speed demand input, and given that a J1939
Diagnostic Code is not active, the engine will prioritize the TSC1 request
above all other speed demand inputs. In effect, TSC1 over-rides all other
configured throttle inputs.
There are currently 2 TSC1 fault-handling options available in the service tool,
these are described as ‘TSC1 Continuous Fault Handling: Disabled or
Enabled’.