xLadder user manual-V2.0.0.6

8.Assignment and function of SM special storage area

SMB0 Always_On

SM0.0 Always ON

First_Scan_On

SM0.1 ON for the first scan cycle only SM0.4 30 seconds OFF,30 seconds ON SM0.5 0.5 second OFF,0.5 second ON

Clock_60s Clock_1s

SMB1

Set to 1 by the execution of certain instructions when the operation result = 0 Set to 1 by exec. of certain instructions on overflow or illegal numeric value. Set to 1 when a math operation produces a negative result

Result_0

SM1.0

Overflow_Illegal SM1.1

Neg_Result

SM1.2

Divide_By_0

SM1.3 Set to 1 when an attempt is made to divide by zero

Set to 1 when the Add to Table instruction attempts to overfill the table Set to 1 when a LIFO or FIFO instruction attempts to read from an empty table Set to 1 when an attempt is made to convert a non-BCD value to a binary value Set to 1 when an ASCII value cannot be converted to a valid hexadecimal value

Table_Overflow

SM1.4

Table_Empty

SM1.5

Not_BCD

SM1.6

Not_Hex

SM1.7

The PLC variables addresses of LCD keys: F1 → SM191.0 F2 → SM191.1 F3 → SM191.2 F4 → SM191.3

ESC

→ → → → → →

SM190.0 SM190.1 SM190.2 SM190.3 SM190.4 SM190.5

OK UP

DOWN LEFT

RIGHT

When the value of SM192.0 is equal to 1,LCD will be bright. When the value of SM192.0 is equal to 0,LCD will be dark. SMW22-SMW26 Scan time (millisecond)

220

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