Rockwell-automation 1771-DB Basic Module User Manual - Series A Manual de usuario descargar pdf (Pagina 130)

Operating Functions

Chapter 5

5–93

The Active LED is on constantly during program execution or command

mode. When you issue a CALL 79 the Active LED remains on while a

program executes and blinks every second when the module is in the

command mode. Issue CALL 79 again to cancel the blinking LED.

CALL 80 checks the module’s battery condition. If a 0 is POPed after a

CALL 80, battery is okay. If a 1 is POPed a low battery condition exists.

Example:

u10 CALL 80

u20 POP C

u30 IF C tu0 THEN PRINT “BATTERY LOW”

u40 END

Use CALL 81 before burning a program into PROM memory. This routine:

determines the number of PROM programs.

determines the number of bytes left in PROM.

determines the number of bytes in the RAM program.

prints a message telling if enough space is available in PROM for the

RAM program.

checks PROM validity if no program is found.

prints a good or bad PROM message. A bad PROM message with an

address of 00xx indicates an incomplete program.

cannot detect a defective PROM.

No PUSHes or POPs are needed.

5.12.2

Blink the Active LED by

Default – CALL 79

5.12.3

Check Battery Condition –

CALL 80

5.12.4

User PROM Check and

Description – CALL 81

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Rockwell-automation 1771-DB Basic Module User Manual - Series A Manual de usuario Pagina 130