Chapter 2 Devices, Symbols and Instructions 2_ *1: The decimal forms are notated by K in the device table in chapter 3, whereas they are entered directly in ISPSoft. For example, entering 50 in ISPSoft indicates the value K50. *2: The floating-point numbers are notated by F/DF in the device table in chapter 3, whereas they are represented by decimal points in ISPSoft. For example, entering 500.0 in ISPSoft indicates the value F500. *3: The strings are notated by $ in chapter 3, whereas they are represented by adding quotes (“ ”) to the value in ISPSoft. For example, entering “1234” in ISPSoft indicates the string 1234.
2-3 Type Device name Number of devices Range Word device Output relay Y 512 Y0~Y511 Data register D 65536 D0~D65535 Special data register SR SR: 2048 SR0~SR2047 Link registers L 1048576 L0~ L65535 Timer T 2048 T0~T2047 Counter C 2048 C0~C2047 32-bit counter HC/AC HC: 64 AC: 56 (AHxxEMC) HC0~HC63 AC0~AC55 (AHxxEMC) Index register E 32 E0~E31 Constant* Decimal system K 16 bits: -32768~32767 32 bits: -2147483648~2147483647 Hexadecimal system 16# 16 bits: 16#0~16#FFFF 32 bits: 16#0~16#FFFFFFFF Single-precisio n floating-point number F 32 bits: ±1.17549435-38~±3.40282347+38 Double-precisi on floating-point number DF 64 bits:
±2.2250738585072014-308~ ±1.7976931348623157+308 String* String “$” 1~31 characters Pointer* Pointer PR