2 Functions of Devices in DVP-PLC are the devices to store the 32-bit value. 2. Timed interruption: PLC automatically interrupts the currently executed program every a fixed period of time and jumps to the execution of a designated interruption subroutine. 3. Interruption when the counting reaches the target: The high-speed counter comparison instruction API 53 DHSCS can designates that when the comparison reaches the target, the currently executed program will be interrupted and jump to the designated interruption subroutine executing the interruption pointers I010, I020, I030, I040, I050 and I060. 4. Pulse interruption:
The pulse output instruction API 57 PLSY can be set up that the interruption signal is sent out synchronously when the first pulse is sent out by enabling flags M1342 and M1343. The corresponding interruptions are I130 and I140. You can also set up that the interruption signal is sent out after the last pulse is sent out by enabling flags M1340 and M1341. The corresponding interruptions are I110 and I120. 5. Communication interruption: I150: After COM2 receives a specific character by means of the communication instruction RS, I150 will be enabled. The specific character is set in the low byte in D1168.
If a PLC is connected to a communication device, and the length of the data that the PLC receives is not the same, this function can be used. I160: After COM2 receives a certain number of data by means of the communication instruction RS, I160 will be enabled. The number of data can be set in the low byte in D1169. If D1169 = 0, I160 will not be triggered. I170: After the slave station COM2 finishes receiving data, I170 will be enabled. Normally when the communication terminal of the PLC is in Slave mode, PLC will not immediately process the communication data entered but process it after the END is executed.
Therefore, when the scan time is very long and you need the communication data to be processed immediately, you can use interruption I170 for this matter. I151, I161, I153, and I163 are only applicable to EH3/EH3-L/SV2 version 2.00 and above. I151: After COM1 receives a specific character by means of the communication instruction RS, I151 will be enabled. The specific character is set in the low byte in D1397. If a PLC is connected to a communication device, and the length of the data that the PLC receives is not the same, this function can be used. If D1397 = 0, I151 will not be triggered. I161:
After COM1 receives a certain number of data by means of the communication instruction RS, I161 will be enabled. The number of data can be set in the low byte in D1398. If D1398 = 0, I161 will not be triggered. I153: After COM3 receives a specific character by means of the communication instruction RS, I153 will be enabled. The specific character is set in the low byte in D1242. If a PLC is connected to a communication device, and the length of the data that the PLC receives is not the same, this function can be used. If D1242 = 0, I153 will not be triggered. I163: After COM3 receives a certain number of data by means of the communication instruction RS, I163 will be enabled.
The number of data can be set in the low byte in D1243. If D1243 = 0, I163 will not be triggered. In the program in a EH3/SV2 series PLC, three communication interrupts at most can be enabled. Please see the table below for more information. (SV2 series PLCs do not support COM3.) DVP-PLC Application Manual 2-37 Communication interrupt number 1 2 3 COM1 communication interrupt I161 I151 COM2 communication interrupt I150 I160 I170 COM3 communication interrupt I163 I153