Control word and status word for communication between Siemens plc and Siemens inverter - Database & Sql Blog Articles

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The recent commissioning involved Siemens plc and 6SE70 inverter communication, because there was no in-depth contact with Siemens communication connection before, there are problems about control words and status words, and asked experienced experts, now just know a little fur, good The memory is not as good as the bad one. Let me remember it first, and then study it slowly and for your reference.
Here is just one example of starting the inverter and speed reference.
Here is the PPO 5 communication method, so there should be 10 PZD, but here we only use the first two PZD.
The PLC sends the first PZD of the inverter to the K3001 word in the inverter. K3001 has 16 bits, from high to 3115 to 3100 (not 3001.15 to 3001.00). When parameter P554 of the inverter is 1, the inverter stops when it starts to 0, P571 controls forward rotation, P572 control reverses if P554 is set equal to 3100, then K3001 bit 3100 controls the start and stop of the inverter, P571 is set equal to 3101, then 3101 controls the forward rotation, P572 is set equal to 3102, then 3102 controls the reverse. After these settings, K3001 is the first control word that the PLC gives to the inverter. At this time, the 3100 to 3115 of the K3001 has a fixed 16 bits except for the 3110 control. Therefore, when the setting P554 is equal to 3101, the 3101 can also control the start and stop. When P571 is equal to 3111, the 3111 controls the forward rotation, and so on. Because bit 3110 of K3001 is fixed as “control request”, this must be 1 inverter to accept the control signal of PLC, so there is no parameter corresponding to this bit in the inverter.
PLC sends the second PZD of the inverter to the K3002 word in the inverter. The parameter P443 of the inverter stores the given value. If the parameter P443 is set equal to K3002, then the whole word K3002 is the main given by the PLC to the inverter. Control word. The size of the second word sent by the PLC is 0 to 16384 (decimal-), (corresponding to 0 to 100% of the inverter output). When it is 8192, the inverter output frequency is 25Hz.
The output of the inverter to the PLC's first PZD word is P734.1, the second PZD word is P734.2, and so on. To use the first PZD received by the PLC as the first status word, you need to put P734.1=0032 (same word K0032) in the inverter, and use the second PZD received by the PLC as the second one. The status word needs to be P734.2=0033 (same word K0032) in the inverter. (When BIT 1 of K0032 is 1, the inverter is ready, BIT 2 means the inverter is running, etc.)
(The words stored in the inverter are K0032, K0033, etc., and the PZD sent by the inverter to the PLC is P734.1, P734.2, etc.) P734.3=0148 in the inverter, put in the inverter P734.4=0022, then the third and fourth inverters PZD contain the percentage of the actual output frequency and the percentage of the actual output current.
When writing a program, if you use a variable (such as mw1160) to MOVE a bit or a word to PZD, mw1160 contains 16 bits from M1160.0 to M1161.7, with 3001 (or 3002...etc. The correspondence between the bits is:
M1161.0---3100 M1160.0---3108
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M1161.7---3107 M1160.7---3115
In this case, if I set P554.1 to 3100, I only need to write a high level signal into the variable M1161.0, then the inverter will start.
Some of the above texts were reprinted to the Internet forum. Since the person posting the post was also reprinted, the author of the original post could not be found. Thanks to these predecessors here.