Ch a pt er 4 Ins tr uct i on Str uc t ure4 - 513. Pointer register: PR0~PR1514. Pointer register of the timer: TR0~TR715. Pointer register of the 16-bit counter: CR0~CR716. Pointer register of the 32-bit counter: HCR0~HCR717. Constant: The decimal constants are notated by K, and the hexadecimal constants are notatedby 16#.18. String: “$”19. Floating-point number: The single-precision floating-point numbers are notated by F, and thedouble-precision floating-point numbers are notated by DF.20. The length of the data in one register is generally 16 bits. If users want to store the 32-bit datain the register, they have to designate two consecutive registers.21. If the operand used in the 32-bit instruction designates D0, the 32-bit data register composedof (D1, D0) is occupied. D1 represents the higher 16 bits, and D0 represents the lower 16 bits.The same rule applies to the timer and the 16-bit counter.。22. When the 32-bit counter HC is used as the data register, it is only can be designated by theoperand used in the 32-bit instruction.PS. Please refer to chapter 2 for more information about devices.4.2 Restrictions on the Use of the Instructions The instructions which only can be used in the function blocksAPI0065 CHKADR, FB_NP, FB_PN, NED, ANED, ONED, PED, APED, and OPED The instructions which can not be used in the interrupt tasksGOEND The instructions which are not supported in the function blocksLDP, ANDP, ORP, LDF, ANDF, ORF, PLS, PLF, NP, PN, MC/MCR, GOEND, and all pulseinstructions in applied commandsIf users want to use some of the instructions mentioned above, they can use the substituteinstructions.Instruction which can not be used in thefunction blockSubstitute instruction in the functionblockLDP/ANDP/ORP PED/APED/OPEDLDF/ANDF/ORF NED/ANED/ONEDPLS -PLF -NP FB_NPPN FB_PNMC -MCR -All pulse instructions in applied commands Note 1Note 1: Pulse instructions can not be used in the function blocks. If users want to get thefunction of the pulse instruction in the function block, they can refer to the followingexample.Example:1. First, declare 10 bit variables tempBit[10] used in the system.2. When StartBit1 is switched from ON to OFF, network 1 executes the instruction MOV once.3. When StartBit1 is switched from OFF to ON, network 2 executes the instruction MOV once.4. The variable tempBit used in the system can not be used repeatedly.
