ABB COMMANDER C355 User Manual

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3 PROFILES…
Fig 3.3 Ramp Types
3.2 Introduction to Ramp/Soak Profile Control
Information.
• 9 programs.
• Digital State program selection – allows digital inputs to select program to be run.
• 30 programmable segments – can be shared between programs
• Programmable time units – can be programmed in hours or minutes.
• Programmable Ramps – can be programmed as rates or in time units.
• Program repeat – 0 to 99 times or continuously.
• Program holdback hysteresis – separate settings for ramping segments and soak segments.
– can be applied above, below or above and below the set point.
• 6 types of ramp/soak generated events – segment active event, program active event, end of program
event, holdback event, hold active event and time events.
• 6 ramp/soak commands – can be selected from the front panel or via digital signals to run/hold
programs, reset programs, skip forward to next segment, skip backwards to beginning of segment,
increase soak time or decrease soak time (refer to Fig. 3.8 for ramp/soak adjust example).
• 4 time event states – common to each segment.
• Self-seeking set point function – avoids unnecessary delays when a program is started – see Fig. 3.5.
• Retort function – ensures safe operation under fault conditions – see Fig. 3.6.
• Power recovery function – determines ramp/soak profile restart position.
• End of Profile State – latched 'ON' until reset.
The Ramp/Soak facility is a set point profile generator which can be used with any type of control process for more
complex control. A Profile Program is made up of Ramps (the set point is increased or decreased at a linear rate
until it reaches the desired value) and Soaks (the set point is maintained at a fixed value for a set time duration).
3.2.1 Ramp Types – Fig. 3.3
The profile set point can be configured to increment in one of two ways: for a fixed period of time or for a number
of engineering units per hour.
Seg. 1
Start
value
End
value
Start
value
End
value
Start
value
End
value
Seg. 2 Seg. 3
Time
Strt
ENd
tIME
Time Time
Seg. 1
Start
value
End
value
Start
value
End
value
Start
value
End
value
Seg. 2 Seg. 3
Strt
ENd
rAtE
Ramp
Rate
Ramp
Rate
A – Time Units B – Rate of Change

ABB COMMANDER C355 Specifications

General

Model	Commander C355
Type	Controller
Communication Protocols	Modbus RTU
Mounting	Panel Mount
Input Voltage	100 to 240 VAC
Control Method	PID
Inputs	Digital Inputs
Outputs	Relay Outputs
Number of Relays	Up to 3