Chapter 6 Symbol Variables The relation between the data types and the device types which can be allocate is described below.
6-15 Data type AH/AS DVP Device allocate by users Device allocate by Device allocate by Device allocate by the system users the system BOOL Contact M/SM or bit in the device D/L/X/Y Internal memory Contact M/X/Y Contact M WORD D/L/X/Y/E/SR Internal memory D/E/F D DWORD D/L/X/Y/E/SR Internal memory D/E/F D LWORD D/L/X/Y/E/SR (Only support AH) Internal memory None INT D/L/X/Y Internal memory None DINT D/L/X/Y Internal memory None LINT D/L/X/Y (Only support AH) Internal memory None REAL D/L/X/Y Internal memory D D LREAL D/L/X/Y (Only support AH) Internal memory None STRING D/L/X/Y Internal memory None STEP S (Only support AH5x0) S S S COUNTER C/HC C C C TIMER T T T T ARRAY The devices assigned to a symbol whose data type is ARRAY depend on the array type specified.
The array is composed of the devices starting from the device assigned by users or the system, and the number of devices in the array conforms to the size of the array. The devices assigned to a symbol whose data type is ARRAY cannot be SR/SM/E/F devices.