plc外文翻譯3-plc設(shè)計(jì)-在線瀏覽
2025-03-24 06:46本頁(yè)面
【正文】 ht end of a ladder rung. Multiple output elements () are possible (see example). A negated output can be created by using the |NOT| (invert power flow) element. MCR (Master Control Relay) dependency MCR dependency is activated only if an output coil is placed inside an active MCR zone. Within an activated MCR zone, if the MCR is on and there is power flow to an output coil , the addressed bit is set to the current status of power flow. If the MCR is off, a logic 0 is written to the specified address regardless of power flow status. Status word Xx 交通大學(xué)畢業(yè)設(shè)計(jì)（論文） BR CC1 CC0 OV OS OR STA RLO /FC writes: 0 x 0 Example The signal state of output is 1 if one of the following conditions exists: The signal state is 1 at inputs AND OR the signal state is 0 at input . The signal state of output is 1 if one of the following conditions exists: The signal state is 1 at inputs AND OR the signal state is 0 at input AND 1 at input If the example rungs are within an activated MCR zone: When MCR is on, and are set according to power flow status as described above. When MCR is off (=0), and are reset to 0 regardless of power flow. ( ) Midline Output Symbol address ( ) Parameter Data Type Memory Area Description address BOOL I, Q, M, *L, D Assigned bit * An L area address can only be used if it is declared TEMP in the variable declaration table of a logic block (FC, FB, OB). Description ( ) (Midline Output) is an intermediate assigning element which saves the RLO bit (power flow status) to a specified address. The midline output element saves the logical result of the preceding branch elements. In series with other contacts, Xx 交通大學(xué)畢業(yè)設(shè)計(jì)（論文） ( ) is inserted like a contact. A ( ) element may never be connected to the power rail or directly after a branch connection or at the end of a branch. A negated ( ) can be created by using the |NOT| (invert power flow) element. MCR (Master Control Relay) dependency MCR dependency is activated only if a midline output coil is placed inside an active MCR zone. Within an activated MCR zone, if the MCR is on and there is power flow to a midline output coil。 the addressed bit is set to the current status of power flow. If the MCR is off, a logic 0 is written to the specified address regardless of power flow status. Status word BR CC1 CC0 OV OS OR STA RLO /FC writes: 0 x 1 Example M has the RLO: M has the RLO: M has the RLO of the entire bit logic bination. ( R ) Reset Coil Symbol address ( R ) Parameter Data Type Memory Area Description address BOOL I, Q, M, L, D, T, C Reset bit
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