Section 5-Configuration Parameter Details; Introduction; Point Setup Parameters - nvent 910 Series Installation, Operating And Maintenance Instructions

SECTION 5—CONFIGURATION PARAMETER DETAILS

5.1 INTRODUCTION

5.2 POINT SETUP PARAMETERS

26 | nVent.com
The sections that follow explain the various functions of the 910 controller and how they
may be accessed. The first line of each section identifies the function to be described. Each
section goes on to explain the purpose of the function, the range over which it may be set, the
procedure for setting or enabling the feature, and finally any Notes or Cautions that pertain to
the particular function.
Setting and using the alarming functions of the 910 controller is a two step Procedure:
1. The alarm must be enabled or disabled as desired. When using the Operator Console,
access to all alarming functions is available using the ADVANCED CONFIGURE mode
submenus. When using either the Model 780/GCC-9000 Group Communications Controller,
the alarm masks may be found in the HTC SET-UP Section. Please see the appropriate
operating manual for instructions on accessing controller parameters using these devices.
2. The corresponding alarm point value may be modified appropriately for the application.
When using the Operator Console, access to the alarm points is also available using the
ADVANCED CONFIGURE mode sub-menus. Modification of the alarm setpoint values is
found in the HTC SETPOINTS Section of the Model 780/GCC-9000 Group Communications
Controller. Please see the appropriate operating manual for instructions on accessing
controller parameters using these devices.
IMPORTANT: The Operator Console and the Model 780/GCC-9000 will NOT allow modification
of an alarm point value if the alarm has been disabled (DIS) with the exception of the HIGH TS
ALARM temperature settings. These may still be modified if the corresponding HIGH LIMIT
CUTOUT has been enabled (ENA) to incorrect design or factors outside those considered by
the design.
This section describes the setup parameters that relate to the 910.
5.2.1 CONTROL SETPOINT TEMPERATURE
Purpose: The CONTROL SETPOINT temperature is the value at which the heat trace
controller maintains the circuit temperature through either proportional, proportional ambient
SSR, proportional ambient contactor, or deadband control, depending on the controllers'
configuration. The CONTROL SETPOINT temperature is compared to the temperature
measured by the control temperature sensor (TS). A decision is then made to turn on or turn
off the output to control power to the tracer.
Range: –76°F to 1058°F (–60°C to 570°C)
Procedure: Adjust the CONTROL SETPOINT temperature value to the desired maintain
temperature. The HTC will switch the output ON and OFF in an attempt to maintain this
temperature.
IMPORTANT:
• See Section 7.2 of this manual for an explanation of Proportional, Proportional Ambient
SSR, Proportional Ambient Contactor, and Deadband Control algorithms.
• When using the Operator Console, the CONTROL SETPOINT temperature range may
be limited by the CONSOLE SETPOINT MAXIMUM and MINIMUM values (see Sections
5.2.23 and 5.2.24). This is a safety feature to prevent users in the field from modifying the
CONTROL SETPOINT temperature setting to a dangerous level.
5.2.2 ALPHANUMERIC TAG ASSIGNMENT
Purpose: A 19 character alphanumeric TAG may be assigned to a control point to allow it to be
easily associated with a pipe, vessel, process, circuit, drawing name, or number.
Setting: Any combination of 19 characters from A–Z, 0–9, /, -, ., (, ), or #.
Procedure: Using the Operator Console, enter the desired text.