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8.6 Syntax Check Error Codes for Step Instruction
The error codes for the usage of step instruction are as follows:
E51 : TO(S0-S7) must begin with ORG instruction.
E52 : TO(S20-S999) can't begin with ORG instruction.
E53 : TO instruction without matched FROM instruction.
E54 : To instruction must comes after TO, AND, OR, ANDLD or ORLD instruction.
E56 : The instructions before FROM must be AND, OR, ANDLD or ORLD
E57 : The instruction after FROM can't be a coil or a function
E58 : Coil or function must before FROM while in STEP network.
E59 : More than 8 TO# at same network.
E60 : More than 8 FROM# at same network.
E61 : TO(S0-S7) must locate at first row of the network.
E62 : A contact occupies the location for TO instruction.
E72 : Duplicated TO Sxx instruction.
E73 : Duplicated STP sxx instruction.
E74 : Duplicated FROM sxx instruction.
E76 : STP(S0~S7) without a matched STPEND or STPEND without a matched STP(S0~S7).
E78 : TO(S20~S999), STP (S20~S999) or FROM instructions comes before or without STP(S0~S19).
E79 : STP Sxx or FROM Sxx instructions comes before or without TO Sxx.
E80 : FROM Sxx instruction comes before or without STP Sxx.
E81 : The max. level of branches must <=16.
E82 : The max. no. of branches with same level must <=16.
E83 : Not place the step instruction with TO->STP->FROM sequence.
E84 : The definition of STP# sequence not follow the TO# sequence.
E85 : Convergence do not match the corresponding divergence.
E86 : Illegal usage of STP or FROM before convergent with TO instruction.
E87 : STP# or FROM# comes before corresponding TO#.
E88 : During this branch, STP# or FROM# comes before the corresponding TO#.
E89 : FROM# comes before corresponding TO# or STP#.
E90 : Invalid To# usage in the simultaneous branch.
E91 : Flow control function can not be used in the step ladder region.
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