Watlow Series 942 Data Communications - Manual (Page 23)

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How to Use Data Communications WATLOW Series 942
"=" Commands
"= STRT" Command
This command causes the 942 program to start. If the program is already
RUNning, an error will occur.
The syntax for this command (not including protocol characters) is:
= STRT
Check the RUN/HOLD status with the "?MODE" command.
"= STP" Command
The "= STP" command is used to program a given step in your profile. Re-
member that total profilespace is 24 steps. You can use the "= STP" command
only in the HOLD mode.
The syntax for this command (not including protocol characters) is:
= STP
...
Table 8 below shows how to interpret the syntax. Note that each data field is
an ASCII decimal number representing a specific value for each parameter
listed in the table.
A syntax example is Step #16 is a Set Point step, with SP at 255° for 1 hour, 36
minutes, 58 seconds with EV1 ON and EV2 OFF would be:
= <16> <1> <255> <1>
<36> <58> <1> <0>
Data Logging
The data logging feature is a convenient replacement for chart recorders.
Information is sent directly from the Series 942 to a serial printer, or to a
computer disk file. No computer is needed. Data logging provides a handy
reference to review process performance. The time intervals between each
entry and the data printed are user selectable, with the time display resetting
each 24 hours. The Prot parameter must be On, and your control must have
communications for the following parameters to appear.
Log: Selects the data logging function for a printout of the data. This parame-
ter will appear if your 942 has communications, and Prot = On.
PtYP = rAtE PtYP = tI Step Type
Set Point Set Point Soak Jumploop End
Step #
Type Code 1 1 2 3 0
Data.5
Data.6
Data.7
Data.8
Data.9
Data.10
NOTE:
You may write to a
Series 942 step with
the "STP" Command
only when the unit is
in the HOLD mode.
Table 8 -
"=STP" Command
Data. <> = Non-
literal Description.
NOTE:
OFF = 1
Hold = 0