Installation manual

900M050U00  Athena Controls, Inc. 8-1
8. Control Parameters – Required If Outputs
Are Used for Control
8.1 Introduction
The 1ZC, 16C, 18C, and 25C controllers all support both PID and on/off control. If the
controller is equipped with two standard outputs, the outputs can be configured for two
different types of control. For information about the types of applications that are suitable
for each type of control, see 1.5.
The parameters used to customize the control operation are in the CtrLCtrL (control) menu.
This menu is available only when the security access level is set to CnF9CnF9 (configuration)
or FACtFACt (factory).
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If both outputs are configured for use with alarms or turned off (using the output 1 type
and output 2 type parameters), then the CtrLCtrL (control) menu will not be displayed.
Item Parameter Name When Displayed
db.1db.1
Deadband for Output 1 only if output 1 type is on/off
HYS.1HYS.1
Hysteresis for Output 1 only if output 1 type is on/off
db.2db.2
Deadband for Output 2 only if output 2 type is on/off
HYS.2HYS.2
Hysteresis for Output 2 only if output 2 type is on/off
Pb1Pb1
Proportional Band 1 only if output 1 type is PID
Pb2Pb2
Proportional Band 2
only if output 2 type is PID, and output 1 and
output 2 are not both set to the same action
(see Note 1)
derder
Derivative (Rate) Action only if output 1 or output 2 type is PID (see
Note 2)
OFFsOFFs
Offset (Manual Reset)
only if output 1 or output 2 type is PID (see
Notes 2 and 3)
IntInt
Integral Action (Auto Reset)
only if output 1 or output 2 type is PID, and
the value of OFFSOFFS = 0 (see Notes 2 and 3)
Note 1: If output 1 and output 2 are both set to PID direct action, or if both outputs are
set to PID reverse action, then the controller applies the same proportional band to both
outputs. The Pb.2Pb.2 parameter is not needed, so it is not displayed when you step through
the control menu.
Note 2: If both outputs are PID, then the values specified for derder, OFFSOFFS, and IntInt are
applied to both outputs.
Note 3: The controller uses either a manual reset value or an integral action value, not
both.
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The access level in all new 16C, 18C, and 25C controllers is set to CnF9CnF9 at the factory. If you cannot
see the control menu, the access level has been changed to a more restrictive level. Instructions for
changing the access level are in Section 17.