Omron NT31 Operation Manuals page 374

Programmable terminal

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Numeral Display

Reference: Data is stored in the numeral memory table as signed data with a data length of 4

[Display Functions]

When displaying the contents of a numeral memory table allocated to a word at

the host, the contents of the word are first converted to the format for storage in

the numeral memory table (signed hexadecimal), and then converted again in

accordance with the settings for "Display Type" and "Display Sign" settings in

order to display them. Therefore the result also differs according to the settings

made for "Words" and "Storage Type".

An example is given below.

word at host

If the setting for "Storage Type" is "BCD", the contents of the host word(s) (BCD

data) are converted to signed binary (hexadecimal) data and then stored in the

numeral memory table. If the most significant digit in the word contents is "F", it is

regarded as a negative value. If the BCD data is not correct, it is not read out and

the existing value is retained.

If the setting for "Storage Type" is "Binary", the contents of the host word(s) are

stored in the numeral memory table without alteration. However, if a negative val-

ue is written when the number of allocated host words is 1, the number of bits is

increased to accommodate 2-word signed data before storage (refer to the exam-

ple of "F123" above).

When the numeric value for display is designated as unsigned, it is displayed as

an absolute value.

In numeral display, the numeric values are displayed in accordance with the "Gen-

eral" settings.

Numeric value

memory table

numeric value

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