First, the communication format parameters
Intermediate – Intermediate: A material produced during a drug substance processing step that must undergo further molecular modification or refinement to become a drug substance. Intermediates may or may not be isolated. Intermediates are the key products of the previous process of making APIs, which are different in structure from APIs.
Ceftriaxone sodium powder is called preparation, sterile ceftriaxone sodium is called API, and 7-ACA is called intermediate.
Our company specializes in providing key intermediates for various APIs
Intermediate is a very important type of fine chemical products. Its essence is a type of "semi-finished product", which is an intermediate product in the production of certain products. For example, if a product is to be produced, it can be produced from intermediates, saving costs and reducing It is widely used in the synthesis of medicines, pesticides, coatings, dyes and spices. In the field of medicine, intermediates are an important link in the industrial chain of the pharmaceutical industry. They are used for some chemical raw materials or chemical products in the process of drug synthesis. In a word, they are used to produce APIs.
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Different manufacturers' scale weighing instruments have different communication formats, and the communication format of each weighing instrument is fixed. Only set the computer's communication format to suit the needs of the weighing instrument. When setting up the computer communication format, the communication format should be determined according to the requirements of the selected weighing instrument manual.
The parameters of the communication format are: start bit, data bit, stop bit, parity bit, and so on. To determine the character of the start bit, the number of bits of the data bit, and also determine whether the character is ASCII or BCD, whether it is sent in reverse or reverse. Some weighing instruments also have a lot of invalid bits, which should be shielded when setting. Only when each parameter is correctly selected can the communication be normal.
Second, the setting of the weighing instrument communication parameters
Communication baud rate
The baud rate of the weighing instrument is generally 1200, 2400, 4800, 9600, 19200, etc., usually set to 4800.
2. Communication method
The weighing instrument and the computer use RS232 serial communication. If there is a given weighing instrument in the software system, you can set it yourself. The weighing instrument should be set to continuous communication mode to maintain the status of always sending data to the computer during operation.
Third, connect the communication line
1. The output line of the weighing instrument communication interface must be connected to the computer accurately. If the connection is wrong, the weighing instrument output port or computer communication input port may be damaged, and even the weighing instrument and the computer and corresponding external devices may be seriously damaged.
2. Before plugging in the communication connector, you should first turn it off and then plug it in, otherwise it will destroy the communication port.
3. Computer communication must be attended or directed by a professional technician. Non-professionals should not connect at will
Computer standard platform scale RS232 interface: pin 2 is the receiving end RXD, pin 3 is the transmitting end TXD, pin 5 is the grounding line GND.
Single user version
Since the general weighing instrument is only set to continuous communication mode, the computer only needs to receive and not send, so the TXD of the transmitting end can be omitted.
2. One machine double scale
The computer requires two serial ports, and the computer is set to two serial ports. 
for example:
Amoxicillin capsules are called preparations, amoxicillin is called API, and 6-APA is called intermediate.
