Watlow Controls Series 998, User Manual

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WATLOW Series 998 User’s Manual
i
Introduction
Starting Out With the Watlow Series 998
Figure i -
The Series 998.
TL W WA
PROCESS
1A 2A 1B 2B
CH A
CH B
DISPLAY
SERIES 998
MODE
AUTO
MAN
Channel A Control Outputs
(Output 1A and 2A)
Channel B Control Outputs
(Output 1B and 2B)
Optional Outputs 3 and 4
(alarms, retransmit or
PC communications)
Channel A Input
(Input 1)
Channel B Input
(Input 2)
Event Input
Watlow’s Series 998 process controller is capable of two independent
channels of process control. Each channel can be configured and tuned
separately. Each alarm option (outputs 3 and 4) can be used to trigger an
alarm based on either channel. The retransmit option, available on output
3, can be used to retransmit the process or set point value of either chan-
nel. The digital communications option can be used to configure and
monitor the controller with a personal computer from a remote location.
If you are unfamiliar with general controller operation, it’s a good idea to
read through the entire manual. The manual is organized in setup order,
with chapters on wiring, menus, operation and applications. If you under-
stand the concept of process/temperature controls and feel comfortable
skipping around through the manual, use the black tabs at the top of
each page to quickly scan the pages and find the topic needed. The Menu
Overview on the next page is a great place to start. Also, refer to Chapter
3 for information on the keys and displays.
The menu map is an overview of all menus and prompts and how to navi-
gate between them. There are three main menu sets: Setup menus
[`SEt] ; Operation menus [OPEr] ; and Factory menus [Fcty] . You can
return to the Display Loop from anywhere by pressing the Display key.
DIP switch locations and settings are explained later in Chapter 1.
Introduction