Analogue control (IOM 220/230 box)
Analogue control can be selected by configuring the regulator type to IOM term. 7, 9, 12 or 14. Analogue reg-
ulation requires an IOM 220 or an IOM 230. To configure the IOM 2xx box, the CAN bus must use option H5,
Engine Interface Communication, and the IOM 220/230 interface or an engine interface must be chosen in
parameter 7561, Engine I/F.
The analogue regulation is controlled with a proportional gain, Kp, an integral action time, Ti, and a differential
action time, Td. If needed, a deadband can also be configured. Deadband is a percentage of the reference
value and the regulator will rest if the actual value is inside the deadband. If the deadband is set to zero, the
deadband is not used.
In manual regulation mode, the Kp and Ti values are used. If both values are zero, the Kp is equal to 1.00
and Ti is equal to 10.00 s. Td is always equal to zero.
An IOM 2xx communication error alarm can be found in parameter 7576. If no PID regulators are configured
to use an IOM 2xx box, the alarm will not be active.
The full-scale regulator output will correspond to the full-scale output selected on the IOM 2xx box. Possible
output types and terminals are listed in the table below.
Type/terminal IOM term. 7 IOM term. 9 IOM term. 12 IOM term. 14
IOM 220 +/-25 mA
0 to 20 mA
+/-12 V
0 to 10 V
+/-25 mA
0 to 20 mA
+/-12 V
0 to 10 V
Not available in IOM 220 Not available in IOM 220
IOM 230 +/-25 mA
0 to 20 mA
+/-12 V
0 to 10 V
+/-25 mA
0 to 20 mA
+/-12 V
0 to 10 V
+/-5 V +/-5 V
It is required that all equipment that is connected to the four terminals on the IOM 2xx box have
high impedance inputs.
EIC (EIC Speed TSC1 telegram)
EIC speed regulation uses the same parameters and setup as the analogue regulation. If no EIC speed is
chosen in any regulator, the EIC speed output (TSC1) on the CAN bus is just signalling the nominal rpm.
In this setting the regulator output is scaled in relation to the nominal rpm range 100 to 4000 rpm. On the
Scania interface "Scania EMS" and "Scania EMS 2 S6", the output is limited to 3000 rpm, but the scaling is
still 100 to 4000 rpm. On all other engine interfaces the range is limited to 3275 rpm, the scaling is still the
same, 100 to 4000 rpm.
The regulator output is also limited by the nominal rpm set point. This has been done to make it possible to
use the overspeed alarm.
9.1.8 Minimum/Maximum/Inverse
If the full range of the regulator output is not to be used, it is possible to limit the output by two parameters.
For PID1 these parameters are called 2802 PID1 Minimum and 2803 PID1 Maximum. Similar parameters can
be found for PID2 and PID3.
AGC 100 Designer's Reference Handbook
4189340766 UK
PID controller (AGC 110 only)
DEIF A/S Page 150 of 152
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