Setra Systems L series Specifications download pdf (Page 25)

encountering this error is small.

THE VERIFY FUNCTION

When many balances or other peripherals are connected to a computer, it is useful for

the computer to be able to check on the status of these devices. The verify function can

be used to determine the model number of a balance and determine that the unit is

functioning correctly. To invoke the verify function, transmit an ASCII “V”. If the balance

is functioning correctly, it will send one of the following messages followed by a carriage

return and line feed:

“Setra 12000”

“Setra 5000”

“Setra 2000”

“Setra 500”

STATUS AFTER POWER IS APPLIED

All Setra balances have an internal nonvolatile memory for storing certain status

information. This memory does not erase when power is removed from the unit. All setup

functions (such as baud rate, and tone enable/disable) and user conversion factors are

stored in this memory. As a result, the baud rate will not need to be reset each time the

balance is turned on. However, if continuous print mode is desired, follow the procedure

outlined previously.

During the first thirty seconds of operation, the balance will run through a self-diagnostic

procedure. When the unit is ready to be used, it will identify itself by transmitting a “wake-

up” message.

THE RS-232 INTERFACE HARDWARE

Although Setra balances can communicate with almost any RS-232 device, the built-in

interface does not include the complete protocol. Only four lines of the standard

interface are used. The data format is:

8 bits

1 start bit

1 stop bit

no parity

framing errors ignored

Use a RS-232 cable to connect the external device to the balance, or construct one

following the instructions below.

The female connector pinout, as viewed from the back of the balance, is shown below.

13 3 2 1

* * * * * * * * * * * * *

* * * * * * * * * * * *

25 14

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Setra Systems L series Specifications Page 25