3-5SectionChanging Numeral and Character String Display
321
Changing Numerals/Character Strings by Copying the Contents by Operation at the
PT Status Control Area
If this method is used, contents can be copied between any required memory
table entries at any time in response to a command from the host. Note that this
method is possible only for the following combinations.
• Numeral memory table entry → Numeral memory table entry
• Character string memory table entry → Character string memory table entry
A
A
A
PC
PT
Memory table entries
Copy source
Copy destination
(for display)
PT status control area
Screen switch setting
← Copy destination memory table entry number
PT status control setting
← Copy execution command
Reserved for system use
Copy memory
← Copy source memory table number
table setting
Reference: If the Words settings differ between the memory table entries (copy source
and copy destination table entries), numerals or character strings are copied
correctly since 2 words are secured for a numeral memory table entry and 20
words for a character string memory table entry in the PT. If the memory table
entry is allocated a word in the host, however, copying may not be executed
correctly if the Words settings differ between the memory table entries (copy
source and copy destination table entries).
When the PT is set to NT20S or NT30/620 compatible mode, copying between
memory table entries is performed differently. Refer to Appendix C for details
on the NT20S and NT30/620 compatible modes.
Words must be allocated for the PT status control area in the host. No special
settings are required for copying the data between memory table entries.
The following areas are provided in the PT status control area to be used for co-
pying the data between memory table entries.
• 2nd word from the beginning of the area (word n + 1)
Copy source memory table entry number
• 3rd word from the beginning of the area (word n + 2)
Copy destination memory table entry number
• 4th word from the beginning of the area (word n + 3)
Memory table entry type (bit 2) and PT status control bit that instructs the
execution of copying (bit 3)
(n: Beginning word address of the PT status control area)
15
n
n+1
n+2
n+3
n+4
14131211109876543210
Word Bit
Screen No. (4-digit BCD or hexadecimal)
Screen switch setting
Copy source memory table entry number
(4-digit BCD or hexadecimal)
Copy destination memory table entry number.
(4-digit BCD or hexadecimal)
Copy memory
table entry
setting
PT status control bits
PT status control
Reserved for system use
The configuration and functions of these words are different
when the PT is in NT20S or NT30/620 compatible mode.
Setting
Operation
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