West Control Solutions Pro-EC44 - Manual (Page 259)

Pro-EC44 2-Loop Graphical Profile Controller & Recorder
Pro-EC44 Product Manual - 59540-1 October 2013 Page 252
Ethernet
Functions General communications (inc. extraction of data recordings, transfer
of configuration & profile files to or from the PC software).
Type: Ethernet communications module.
Connection Locates in plug-in Slot A. Connection via RJ45 socket in case top.
Protocol: Modbus TCP Slave only.
Supported Speed: 10BaseT or 100BaseT (automatically detected)
IP Address Allocation: Via DHCP or manual configuration via PC Tool.
Isolation: 240V reinforced safety isolation from all inputs and outputs.
USB Socket
Functions Extraction of data recordings, transfer of configuration & profiles files
to or from the PC software or direct to another controller.
Targeted Peripheral: USB Memory Stick.
Supply Current Up to 250mA.
Connection Locates in slot C. Provides an optional front mounted connector.
Protocol: USB 1.1 or 2.0 compatible. Mass Storage Class.
Isolation: Reinforced safety isolation from all inputs and outputs
Control Loop(s)
Control types 1 or 2 control loops, each with either standard PID (single or dual
control) or Valve Motor Drive (3-point stepping PID control).
2 internally linked cascade loops, with standard PID (single or
dual control) or Valve Motor Drive (3-point stepping PID control).
1 Ratio loop for combustion control.
VMD Feedback Second input can provide valve position feedback or flow indication.
Feedback not required or used for control algorithm.
Tuning Types: Pre-Tune, Auto Pre-Tune, Self-Tune and Manual Tuning with up to 5
PID sets stored internally for each control loop.
Gain Scheduling Automatically switches the 5 PID sets at user definable break-points
relating to the process variable or setpoint value.
Proportional Bands: Primary & Secondary (e.g. Heat & Cool) 1 to 9999 display units, or
On-Off control.
Automatic Reset Integral Time Constant, 1s to 99min 59s and OFF
Rate Derivative Time Constant, 1s to 99 min 59s and OFF
Manual Reset Bias added each control algorithm execution.
Adjustable 0 to 100% of output power (single primary control) or -
100% to +100% of output power (dual primary & secondary control).
Deadband/Overlap: Overlap (+ve values) or Deadband (-ve values) between primary &
secondary proportional bands for Dual Control. Adjustable In display
units - limited to 20% of the combined proportional bands width.
ON/OFF Differential: ON/OFF switching differential 1 to 300 display units.
Auto/Manual Control: Selectable with “bumpless” transfer when switching between
Automatic and Manual control.
Control Cycle Times: Selectable from 0.5 to 512 seconds in 0.1s steps.
Setpoint Maximum: Limited by Scaled Input Upper Limit and Setpoint Minimum.
Setpoint Minimum: Limited by Scaled Input Lower Limit and Setpoint Maximum.
Setpoint Ramp: Ramp rate selectable 1 to 9999 LSD’s (Least significant display
digits) per hour and OFF (infinite).