24

Digital Controller

E5AK/E5EK

Level 0 Mode

Set the Controller to this mode during normal operation. In this mode, change the set point during operation, and

start or stop Controller operation. The process value, ramp SP, and manipulated variable can only be monitored

in this mode.

Level 1 Mode

The main mode for adjusting control. In this mode, execute AT (auto-tuning), and set alarm values, the control pe-

riod, and PID parameters.

Level 2 Mode

The auxiliary mode for adjusting control. In this mode, set the parameters for limiting the manipulated variable and

set point, switch between the remote and local modes, switch between the SP mode, and set the loop break alarm

(LBA), alarm hysteresis, and the digital filter value of inputs.

Setup Mode

The mode for setting the basic specifications. In this mode, set parameters that must be checked or set before

operation such as the input type, scaling, output assignments and direct/reverse operation.

Expansion Mode

The mode for setting expanded functions. In this mode, set ST (self-tuning), SP setting limiter, select advanced

PID or ON/OFF control, specify the standby sequence resetting method, and set the time for automatic return to

the monitoring display.

Option Mode

The mode for setting option functions. Select this mode only when the Option Unit is set in the Controller. In this

mode, set the communications conditions, transfer output and event input parameters to match the type of Option

Unit set in the Controller. Heater burnout latch function, position-proportional travel time, and remote SP scaling

parameter are also located in this mode.

Calibration Mode

The mode for calibrating inputs and transfer output.

When calibrating input, the selected input type is calibrated. Whereas, transfer output can be calibrated only when

the Communications Unit (E53-CKF) is set in the Controller.

■ Parameter Operation

Refer to the E5AK/E5EK User’s Manual (H83/H85) for each parameter and the calibration mode in detail.

Refer to page 9 for the setting in detail.

Level 0 Mode

PV/SV

The process value is displayed on the No.1 display and the set point

is displayed on the No.2 display.

When the multi-SP function is in use, the value of whichever is set,

set point 0 or 1, is linked.

Remote SP Monitor

Monitors remote SP in the local SP mode.

Set Point During SP Ramp

Monitors the set point when the SP ramp function is used.

SP Ramp

With the SP ramp function, the Controller operates according to the

value (set point during SP ramp) limited by a change rate, instead of

the changed set point when the set point is changed. The interval in

which the set point during SP ramp is limited is referred to as the “SP

ramp.”

The change rate during the SP ramp is specified by the “SP ramp set

value” and “SP ramp time unit” parameters. At the “SP ramp set

value” default “0,” the SP ramp function is disabled.

The set point changing in SP ramp can be monitored in the “Set point

during SP ramp” parameter (level 0 mode).

Process value

PV/SV (local SP/remote SP)

Set point during SP ramp

For E5

@K-PRR2

MV monitor (heat)

Run/Stop

(Heat/Cool)

Manipulated

variable

Valve opening

monitor

MV monitor

(cool)

Manipulated

variable

Set point

SP ramp

SP ramp time unit

Switching point

Time

SP ramp

set value