PMAC-2ACC8S IMAC-LX/FX motion controller

PMAC-2ACC8S I0 controls the Turbo PMAC card number for software addressing purposes on a multi-drop serial communications cable. If I1 is set to 2 or 3, the Turbo PMAC must be addressed with the PMAC-2ACC8S @n command, where n matches the value of I0 on the board, before it will respond. If the Turbo PMAC receives the @n command, where n does not match I0 on the board, it will stop responding to commands on the serial port. No two boards on the same serial cable may have the same value of I0. If the @@ PMAC-2ACC8S command is sent over the serial port, all boards on the cable will respond to action commands. However, only the board with I0 set to 0 will respond to the host with handshake characters (no data responses are permitted in this mode). All boards on the cable will respond to control-character action commands such as , regardless of the current addressing.

PMAC-2ACC8S Note: RS-422 serial interfaces must be used on all Turbo PMAC boards for multi-drop serial communications; this will not work with RS-232 interfaces. If the RS-422 interface is not present as a standard feature on the PMAC2 board, the Option 9L serial converter module must be purchased. It is possible to use an RS-232 interface on the host computer, connected to the RS-422 ports on the Turbo PMAC boards.

PMAC-2ACC8S Definitions:
• constant — numerically specified non-changing value
• variable — entity that holds a changeable value
• I-variable — variable of fixed meaning for card setup and personality (1 of 8192)
• P-variable — global variable for programming use (1 of 8192)
• Q-variable — local variable (in coordinate system) for programming use (1 of 8192)
• M-variable — variable assigned to memory location for user use (1 of 8192)
• pre-defined variable — mnemonic that has fixed meaning in card
• function — SIN, COS,TAN,ASIN,ACOS,ATAN,ATAN2,LN,EXP,SQRT,ABS,INT
• operator — for arithmetic or bit-by-bit logical combination of two values: +, -, *, /, % (mod), & (and), | (or), ^ (xor)
• expression — grouping of constants, variables, functions, and operators
• data — constant without parentheses, or expression with parentheses
• comparator — evaluates relationship between two values: =, !=, >, !>, <, !<, ~, !~
• condition — evaluates as true or false based on comparator(s)
• simple condition — {expression} {comparator} {expression}
• compound condition — logical combination of simple conditions
• motor — element of control for hardware setup; specified by number
• coordinate system — collections of motors working synchronously
• axis — element of a coordinate system; specified by letter chosen from X, Y, Z, A, B, C, U, V, W
• buffer — space in user memory for program or list; contains up to 256 motion programs and 32 PLC blocks