Connecting the oit to an ascii host, Serial communication – Maple Systems OIT Family (ASCII) User Manual
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The illustration of an OIT5400, shows the features typically found on an OIT Family Opera-
tor Interface Terminal (not all features are available on all models).
Connecting the OIT to an ASCII Host
OITs provide the interconnecting link between the plant floor operator and a manufacturing control
system through the use of an ASCII host. The OIT communicates to the ASCII host through a serial
port located on the ASCII host. The serial communications is either RS-232 or RS-422/485.
Serial Communication
The OIT3160, OIT3200, OIT3600, OIT4160, and OIT4400 have one serial communications
port that is used both to connect to the ASCII host and to configure the OIT. This port uses a
standard subminiature 9-pin, D-style connector (except the OIT3600 which has a terminal
block connection) and supports both RS-232 and RS-422/485 communications at baud rates
from 300 to 19200.
The OIT3250, OIT4450, and OIT5400 have two serial communications ports. One port sup-
ports both RS-232 and RS-422/485 communications and is used to connect to the ASCII
host. The second port supports RS-232 communications and is used to configure the OIT, to
connect the OIT to a serial printer, and for external alarm and buzzer outputs. Both ports use a
standard subminiature 9-pin, D-style connector and support baud rates from 300 to 19200.
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OIT Family Operation Manual (ASCII)
1010-0088, REV02
1. Global Function Keys
2. Function Key LEDs
3. Customizable Function Key
Legends
4. Status LEDs
5. Customizable Status LED
Legends
6. Customizable Product ID/Logo
Insert
7. System LEDs
8. NEXT MESSAGE and LAST MESSAGE
Keys
9. PAGE UP and PAGE DOWN Keys
10. HELP Key
11. SETUP Key
12. PRINT SCREEN Key
13. ALARM ACKNOWLEDGE Key
14. INCREMENT and DECREMENT Keys
15. TOGGLE Key
16. CLEAR, DELETE, and ENTER Keys
Message
Alarm
Run
Page
Down
Alarm
Ack
Page
Up
Toggle
Help
Setup
Next
Message
E
N
T
E
R
0
7
4
8
1
9
Delete
Clear
5
2
6
3
Screen
Last
Message
F1
F2
F3
F4
F5
F6
F7
F8
F9
F10
F11
F12
F13
F14
F15
F16
S 1
S 2
S 3
S 4
S 5
S 6
S 7
S 8
15
13
12
9
8
6
4
5
3
2
1
7
19
16
17
18
10 11
14