IDEC TXD Instructions

Application Note:

Transmitting a Value Bigger than 65,535

in BCD Format with TXD Instructions

You can transmit values from 0 up to 99,999,999 by using the following method.
(1) If a 32-bit value is contained in data registers D0 and D1, you need to convert

this value to hex values using HTOB(D) instruction.

The table below shows examples of conversion results.

32-bit value contained in D0\D1 D2 D3
0 0000h 0000h
1234 0000h 1234h
65535 0006h 5535h
190000 0019h 0000h
12345678 1234h 5678h
99999999 9999h 9999h

Note: If the value contained in D0\D1 is bigger than 99,999,999, a user
program execution error occurs and ERROR LED turns on.

(2) If you want to transmit a 6 digit value with a TXD instruction, you need to

configure S1 of the TXD as follows.

Upper 2 digits setting Lower 4 digits setting

For more information please call 800-262-IDEC or email [e-mail]. 1

The TXD instruction dialog box will appear, as shown here:

Click OK to close the dialog box.

2 For more information please call 800-262-IDEC or email [e-mail].