| 提交 | 用户 | 时间 | ||
| 71e81e | 1 | package cn.stylefeng.guns.plcserver.server.EOP020.callback; |
| 懒 | 2 | |
| 3 | import cn.stylefeng.guns.plcserver.opc.GlobalVariable; | |
| 4 | import cn.stylefeng.guns.plcserver.opc.OPCComm; | |
| 5 | import cn.stylefeng.guns.plcserver.opc.unit.OPCUnit; | |
| 6 | import org.jinterop.dcom.common.JIException; | |
| 7 | import org.jinterop.dcom.core.JIVariant; | |
| 8 | import org.openscada.opc.lib.da.DataCallback; | |
| 9 | import org.openscada.opc.lib.da.Item; | |
| 10 | import org.openscada.opc.lib.da.ItemState; | |
| 11 | ||
| 12 | public class DataCallBack_EOP020_F_HEART_BEAT implements DataCallback { | |
| 13 | ||
| 14 | private OPCComm opc = OPCComm.getInstance(); | |
| 15 | private int count = 0; | |
| 16 | ||
| 17 | @Override | |
| 18 | public void changed(Item item, ItemState itemState) { | |
| 19 | // 读取心跳变量的值 | |
| 20 | try { | |
| 21 | if (itemState.getValue().getType() == JIVariant.VT_BOOL) { | |
| 22 | boolean value = itemState.getValue().getObjectAsBoolean(); | |
| 23 | setHeartbeat(value); | |
| 24 | } | |
| 25 | } catch (JIException e) { | |
| 26 | e.printStackTrace(); | |
| 27 | } | |
| 28 | } | |
| 29 | ||
| 30 | /** | |
| 31 | * 设置心跳标志位，保存到全局变量 | |
| 32 | */ | |
| 33 | public void setHeartbeat(boolean value) { | |
| 34 | if (!value) { | |
| 35 | OPCUnit.write(opc.getEOP020_F_HEART_BEAT(), "true"); | |
| 36 | GlobalVariable.EOP020_F_HEART_BEAT = true; | |
| 37 | count = 0; | |
| 38 | } else { | |
| 39 | count++; | |
| 40 | } | |
| 41 | // 循环读取频率是：500ms一次，如果超过6次，也就是3s认定超时 | |
| 42 | if (count > GlobalVariable.HEART_MAX_COUNT) { | |
| 43 | GlobalVariable.EOP020_F_HEART_BEAT = false; | |
| 44 | } | |
| 45 | } | |
| 46 | ||
| 47 | } | |
