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6Ć33
6.8.2 CLOSE
Statement
The
CL
OSE statement is used to deĆallocate a channel or port to
allow other application tasks to have access to it. The CLOSE
statement has the following format:
CLOSE #logical_device_number, #logical_
device_number,...
where:
logical_device_number = number assigned to device by OPEN
statement (1 to 255)
The following are valid CLOSE statements:
20 CL
OSE #1,#2
99 CL
OSE #3
The number symbol (#) must always be present in front of the
logical device number assigned to the device.
If PRINT or INPUT statements use the default port (e.g., PRINT F%
or INPUT M$), there is no need for either an OPEN or CLOSE
statement.
Channels that are opened, as opposed to devices, remain opened
until the task is restarted.
Refer to the OPEN statement description (6.8.1) for more informtion
on how the CLOSE statement is used with the OPEN statement.
6.8.3 INPUT
Statement
The INPUT statement is used to prompt an operator to input data
from a device or channel. It has the format:
INPUT #logical_device_number, input_list
where:
logical_device_number =
number assigned to device or channel by OPEN statement (1 to
255). Not used if default device is used.
input_list =
list of variables to be read. Variables can be simple or
subscripted (no expressions).
The optional parameter :EMPTY=n can be used to transfer control
of the program in the event that the channel is empty. This option is
only allowed for channels and not devices. The parameter is added
immediately after the device number; n is the line number to which
to transfer control.
If more than one variable is to be read, the fields must be separated
by commas when entered. Any extra spaces or tabs between the
input fields are ignored.
When an INPUT statement is executed in BASIC, an input prompt is
printed to the device to indicate that the system is waiting for
something to be entered. The input prompt is a question mark
followed by a space (?).
The number of fields requested in the INPUT statement are then
entered at the device, followed by the terminator character (<CR>).
If all of the requested fields are not entered prior to the (<CR>), the
- r 1
- 1
- 1
- 1
- 1
- Table of Contents 3
- 6
- 7
- 1.0 INTRODUCTION 9
- 10
- 2.0 PROGRAMMING FOR 13
- AutoMax SYSTEMS 13
- 14
- 3.0 STRUCTURE OF AN 17
- AutoMax ENHANCED BASIC 17
- 18
- 19
- 4.0 VARIABLES AND 21
- CONSTANTS 21
- 26
- 28
- 29
- 30
- 30
- 31
- 5.0 EXPRESSIONS 33
- 35
- 36
- 5.4 Relational Expressions 38
- 39
- 6.0 AutoMax ENHANCED BASIC 41
- STATEMENT TYPES 41
- 43
- 43
- 44
- 6.3 Variable Assignment 46
- (LET/SET_MAGNITUDE) 46
- 6.4.1 GOTO (GO TO) Statement 47
- 49
- (Subroutines) 50
- 52
- 52
- 53
- 57
- 57
- 59
- 59
- 60
- 60
- 6.7 Real Time Enhancements 62
- 63
- 63
- 6.8.1 OPEN 64
- Statement 64
- 1514131211109 87 6543210 67
- FOR INPUT STATEMENTS 67
- 6.8.2 CLOSE 73
- 6.8.3 INPUT 73
- 6.8.4 PRINT/PRINT 75
- USING Statements 75
- 82
- 82
- 82
- 83
- 83
- 83
- 84
- 6.9 Error Handling 85
- 6.10 INCLUDE Statement 86
- 6.11 Stopping Execution 87
- (STOP and END Statements) 87
- 89
- 90
- 90
- 90
- 90
- 7.5 LN Function 91
- 7.6 EXP (e**x) Function 91
- 7.7 SQRT Function 91
- 7.8 ABS Function 91
- 7.9 CHR$ Function 91
- 92
- 92
- 92
- 7.13 BINARY$ Function 93
- 7.14 HEX$ Function 93
- 7.15 LEFT$ Function 93
- 7.16 RIGHT$ Function 94
- 7.17 MID$ Function 94
- 7.18 VAL% Function 94
- 7.19 VAL Function 95
- 7.20 FIX Function 95
- 7.21 CURPOS$ Function 95
- 96
- 96
- 97
- 7.25 BIT_SET@ Function 98
- 7.26 BIT_CLR@ Function 98
- 7.27 BIT_MODIFY@ Function 98
- 99
- 100
- 100
- 7.32 BCD_OUT% Function 101
- 7.33 BCD_IN% Function 101
- 7.31 ROTATER% Function 101
- 102
- 7.35 GATEWAY_CMD_OK@ Function 103
- 104
- 7.37 TEST_ERRLOG@ Function 105
- 7.38 READVAR% Function 105
- 106
- 7.40 FINDVAR! Function 107
- 7.41 CONVERT% Function 107
- 7.42 RTS_CONTROL@ Function 108
- 109
- 109
- 8.0 ETHERNET 111
- COMMUNICATION 111
- FUNCTIONS 111
- 8.2 SOCKET% Function 112
- 8.3 BIND% Function 112
- 113
- 114
- 115
- 116
- 117
- 118
- 8.10 SETSOCKOPT% Function 119
- 8.11 GETSOCKOPT% Function 120
- 8.12 SHUTDOWN% Function 121
- Appendix A 123
- Appendix B 125
- 126
- 127
- 127
- 127
- AIT, DELAY, EVENT Error Codes 128
- Channel I/O Error Codes 128
- Array Error Codes 128
- 131
- 132
- 135
- 136
- 136
- 136
- Appendix C 137
- 139
- 141
- Appendix F 143
- For additional information 146
- 1 Allen-Bradley Drive 146
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