Siemens SIMATIC S7 System Manual page 242

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Program instructions

FMT operand for the integer to ASCII (ITA) instruction

Double integer to ASCII

DTA IN, OUT, FMT

Non-fatal error conditions with ENO = 0

0006H Invalid indirect address

0091H Operand out of range

FMT bit is not zero for 4 most signif-

icant bits, of the FMT byte

Input / output

The size of the output buffer is always 12 bytes. The number of digits to the right of the

decimal point in the output buffer is assigned by the nnn field. The valid range of the nnn

field is 0 to 5. If you assign 0 digits to the right of the decimal point, then the value is

converted with no decimal point. For values of nnn bigger than 5, the output buffer is filled

with ASCII spaces. The c bit specifies the use of either a comma (c=1) or a decimal point

(c=0) as the separator between whole number and fraction. The most significant 4 bits must

always be zero.

The following figure shows examples of values that are formatted using a decimal point (c=0)

with four digits to the right of the decimal point (nnn=100).

The Double Integer to ASCII instruction converts a double word IN to an array of

ASCII characters. The format parameter FMT specifies the conversion precision

to the right of the decimal. The resulting conversion is placed in 12 consecutive

bytes beginning with OUT.

SM bits affected

ID, QD, VD, MD, SMD, SD, LD, AC, HC, *VD, *LD, *AC, Constant

IB, QB, VB, MB, SMB, SB, LB, AC, *VD, *LD, *AC, Constant

IB, QB, VB, MB, SMB, SB, LB, *VD, *LD, *AC

System Manual, V2.3, 07/2017, A5E03822230-AF

S7-200 SMART

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Simatic s7-200 smart