AH500 Motion Control Module Manual 3.9 Data Registers and Index Registers Registers are classified according to character. There are three types of registers. 1. General register: If the STOP/RUN switch on a module is turned from the STOP position to the RUN position, or a module is disconnected, the values in the general registers will become 0. If SM033 in a module is turned ON, the values in the general registers will be retained after the STOP/RUN switch on the module is turned from the RUN position to the STOP position, and will become 0 after the module is disconnected. 2. Latching register: If a module is disconnected, the values in the latching registers will be retained.
If users want to clear the value in a latching register, they can use the instruction RST or ZRST. There are no latching registers in AH500 series motion control modules. 3. Index register (V)/(Z): V devices are 16-bit registers, and Z devices are 32-bit registers. There are 6 V devices (V0~V5), and 8 Z devices (Z0~Z7) in an AH500 series motion control module. 3.9.1 Data Registers The value in a data register is a 16-bit value. The highest bit in a 16-bit data register represents an algebraic sign. The value stored in a data register must be in the range of -32,768 to +32,767. Two 16-bit data registers can be combined into one 32-bit data register (D+1, D).
The highest bit in a 32-bit data register represents an algebraic sign. The value stored in a 32-bit data register must be in the range of -2,147,483,648 to +2,147,483,647. 3.9.2 Index Registers 16 bits V devices are 16-bit registers. Data can be freely written into a V device, and data can be freely read from a V device. If a V device is used as a general register, it can only be used in a 16-bit instruction. Z devices are 32-bit registers. If a Z device is used as a general register, it can only be used in a 32-bit instruction.
V0 32 bits Z0 X0.0 If X0.0 is ON, the value in V0 will be 8, and the value in Z1 will be 14, the value in D8 will be moved to D16, and the value in D17 will be moved to D12. If a V device or a Z device is an index register used to modify an operand, the V device or the Z device can be used in a 16-bit instruction and a 32-bit instruction. Index registers are like general operands in that they can be used in movement instructions and comparison instructions. They can be used to modify word devices (KnM/KnS/T/C/D/SR devices) and bit devices (X/Y/M/S/SM devices).
3-12 General register (D) D0~D9999 (10,000 data registers) 10,014 registers in total Index register (V)/(Z) V0~V5 and Z0~Z7 (14 index registers) .0 MOV K8 V0 DMOV K14 Z1 MOV D0@V0 D2@Z1 DMOV D3@Z1 D4@V0