Watlow Series 942 Data Communications - Manual (Page 24)

24 WATLOW Series 942 How to Use Data Communications
Host Computer
(rear view)
DB-25 female connector
(located on back of printer
viewed from wire side)
Printer
Series 945 #1
20
21
23
Signal Common
Com
T
Jumper to Signal Common
1
2
3
4
5
9
8
7
6
10
12
13
14
15
16
17
18
19
2 0
21
22
23
24
25
R
RLSD (Received Line Signal Detector)
DSR (Data Set Ready)
RTS (Request To Send)
CTS (Clear To Send)
22
Jumper DTR, DSR, and RLSD together.
Also, jumper RTS and CTS together.
Refer to your printer's user manual.
R
DTR (Data Terminal Ready)
T
11
Data Logging
Int: Selects the time interval for the logging function. This parameter will
appear if your Series 942 has communications, Prot = On, and Log = On. The
logging interval is in tenth of a minute increments.
tag: Selects what variables are to be transmitted out during the data logging
function. This parameter will appear if your Series 942 has communications,
Prot = On, and Log = On. Any combination of process, set point and auxiliaries
may be "tagged" for logging.
Figure 10 -
Data Logging
Interface Wiring
Example.
Series 942
Figure 10 shows a typical wiring example. The connections on the printer may
vary depending on models.
Example: Log = On, Int = 0.1, tag = PSA
P = Process
S = Set Points
A = Auxiliary Status
Output 3 is configured as an alarm, and Output 4 is configured as an event.
Parameters represented:
(C1) (SP1) (A1LO) (A1HI) (Ent2)
TIME PROCESS SET-1 LOW-1 HIGH-1 Event-2
0.0 80 100 32 1382 1
0.1 81 100 32 1382 1
0.2 81 100 32 1382 1
0.3 82 100 32 1382 1
After each line the 942 emits a carriage return. Your printer can be set up to
handle line feeds. The printer must supply a line feed (LF) following a carriage
return (CR). Refer to your printer user's manual for more information.
A data header is printed when the logging function begins. When you change
the time interval (Int), any selected data (tag), or power is cycled, the header will
be printed again. The time display wraps around to 0.0 every 24 hours.
Figure 11 -
Data Logging
Printout Example.