
B–62073E–1/04 2. INTERFACE BETWEEN CNC AND PMC–NA OR NB
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ator message setting). A previously entered operator message can be cancelled by specify-
ing its message number (operator message clearing).
The address section is used to set and clear an operator message.
An operator message number from 0 to 999 is to be specified in binary. For identification, the
control unit prefixes the character string EX to an operator message number from 0 to 99, and
displays EX and a specified operator message number before an operator message charac-
ter string. For an operator message number of 100 or greater, no message number is dis-
played; only a message character string is displayed.
A message character string is to be entered according to item (viii) below immediately after
a specified operator message number.
Up to 128 characters are accepted for each message in the PMC–MODEL NA and up to 256
characters in the PMC–MODEL NB.
The control unit can accept up to four external operator messages at a time. (up to two at a
time when a 9” CRT system is used with the PMC–MODEL NB) Set messages are not cleared
by resetting the control unit. To clear a set message, the external operator message must
be input with its number and clear operation specified.
[Output] There is no corresponding output. So ERDRQ must always be 0.
(viii)Message character strings
[Input] A desired character string can be entered after the setting of an external alarm message or
external operator message. If the immediately preceding external data input is not for such
a setting, an entered message character string is ignored. The data section can contain up
to six characters. Eight bits are used to represent one character. See the character code
table (conforming to the JIS code table.) Higher characters (on the EID47 side) are displayed
earlier.
When the specified character code is 00, the character is ignored. Consequently, an arbitrary
number of characters not exceeding six characters can be sent at a time.
When the character LF (code: 0000 1010) is sent, line feed occurs on the screen display; LF
itself cannot be not displayed.
At the end of a message, the character ETX (code: 0000 0011) is sent. All preceding mes-
sage character strings that have been input are assumed to be continuous. However, the
following restrictions are imposed on the length of a character string:
Alarm message character string ………up to 30 characters
Operator message character string……up to 128 characters
[Output] There is no corresponding output. So ERDRQ must always be 0.
(ix) Custom macro variable values
[Input] By specifying a custom macro variable number, the value of the variable is changed. A vari-
able number from 100 to 999 is to be specified in binary. A common variable must be speci-
fied. If a variable number exceeding a specifiable range (varying from one option to another)
is specified, an alarm is raised.
A variable value in the range 0 to +99,999,999 is to be specified in binary.
[Output] [Output] Specifying a custom macro variable number outputs the value of the variable.
A variable number must be specified for an output request in the same way as it is specified
for an input request.
Signal configuration in external data input/output
The configuration of the address and data sections for external data input/output depends on the type of data
to be transmitted. The table below indicates the configurations.