Chapter 4
– Simulation
35
FCM II Installation Guide: 20160419 - Part # 2307
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CHAPTER 4 S
IMULATION
The FCM II simulator is a special version of an FCM II 4DCIN, 4ACOUT module. The FCM II simulator differs
from an FCM 1 simulator in that it is configured entirely from MultiLoad (no keyboard or display required). This
simulator is able to perform most all of the FCM I simulator functions with the exception of forcing error conditions
and looping back outputs to inputs. Loopbacks may be wired externally however.
4.1
M
ETER
S
IMULATION
Product flow control loops can be run in a demonstration mode by imitating a
“virtual” flow meter (single or
quadrature) and its associated
“virtual” Digital Control Valve. Product flow simulation is automatically enabled
when a meter is assigned to the simulator. Ports 2 and 3 will be automatically assigned and actuated to simulate
the upstream and downstream solenoids of an associated Digital Control valve. Port 4 will be assigned as the
primary meter pulser and the module will behave as if pulses were actually received on Port 4. A quadrature
meter will be simulated if the 'Quad Check Enable' parameter is set in MultiLoad and the secondary meter
channel will be assigned to Port 5.
When ports 2 & 3 are both activated product flow will ramp up. When port 2 is active and port 3 is inactive, flow
will remain constant. When both ports are inactive, flow rate will ramp down to zero.
4.2
A
DDITIVE
S
IMULATION
Up to 4 channels of additive control (Solenoid or Piston type) may also be simulated. If an additive meter is
selected, it will be simulated with a 100 Hz pulser input.
4.3
A
NALOG
S
IMULATION
If analog functions are enabled in MultiLoad such as RTD temperature input, or 4-20mA current input, the
simulator places fixed analog values into these input registers. For the RTD, the fixed temperature is 28.5°C. For
the 4-20mA current input the value is fixed at 12.800mA. The later input provides simulation of a density or
pressure sensor input.
4.4
G
ENERIC
I/O
S
IMULATION
I/O lines not used for Product or Additive simulation are available as general purpose DC inputs or AC outputs.
Do not make connections to field terminals. UNEXPECTED OPERATION MAY RESULT. The I/O
is close looped in logic.