Galil Motion Control RIO-47 series RIO-47100 User Manual

Galil Motion Control RIO-47 series
RIO-47100 User Manual Manual pdf 71 page image

POINTInvalid Variable NamesREALLONGNAME ; Cannot have more than 8 characters123 ; Cannot begin variable name with a numberSTAT Z ; Cannot have spaces in the nameAssigning Values to Variables:Assigned values can be numbers, internal variables and keywords, functions, RIO board parametersand strings; the range for numeric variable values is 4 bytes of integer (231) followed by two bytes offraction (+/-2,147,483,647.9999).Numeric values can be assigned to programmable variables using the equal sign.Any valid RIO functions can be used to assign a value to a variable. For example, s1=@ABS[V2] ors2=@IN[1]. Arithmetic operations are also permitted.To assign a string value, the string must be in quotations. String variables can contain up to sixcharacters that must be in quotation.Examples:INTWO=_TI2 Assigns returned value from TI2 command to variable INTWO.INPUT=@IN[1] Assigns logical value of input 1 to variable INPUTV2=V1+V3*V4 Assigns the value of V1 plus V3 times V4 to the variable V2.Var="CAT" Assign the string CAT to variable VarDisplaying the value of variables at the terminalVariables may be sent to the screen using the format, variable=. For example, V1= , returns thevalue of the variable V1. V1=? or MG V1 are also valid ways of displaying a variable.OperandsOperands allow status parameters of the RIO to be incorporated into programmable variables andexpressions. Most RIO commands have an equivalent operand - which are designated by adding anunderscore (_) prior to the command (see command reference).Examples of Internal Variables:IN1=@IN[1] Assigns value of input 1 to the variable IN1.JP #LOOP,@AN[0]<2 Jump to #LOOP if analog input 0 is less than 2JP #ERROR,_TC=1 Jump to #ERROR if the error code equals 1.Operands can be used in an expression and assigned to a programmable variable, but they cannot beassigned a value. For example: _TI0=1 is invalid.Special Operands (Keywords)The RIO provides a few additional operands that give access to internal variables that are notaccessible by standard RIO commands.Chapter 5 Programming ▫ 71 RIO-47xxx Rev 1.0r