 |
| Place of Origin: | Japan |
| Brand Name: | Tamagawa |
| Certification: | CE |
| Model Number: | TS5320N632 |
| Minimum Order Quantity: | 1pcs |
|---|---|
| Packaging Details: | carton |
| Delivery Time: | in stock |
| Payment Terms: | T/T, Western Union, MoneyGram |
| Supply Ability: | 100pcs/week |
| TAMAGAWA: | TAMAGAWA | TS5320N632: | TS5320N632 |
|---|---|---|---|
| Material: | Iron | Color: | Black |
| Japan: | Japan | Dimension: | 70mm |
| Temperature: | 20-90 | Wire: | Wire |
TS5320N632
| If a port is to respond as a slave to a Modbus master, then do not program that port with | Only one instance of MB_SLAVE can be used with a given port, otherwise erratic behavior may occur. |
| the MB_MASTER instruction. | Your program must control the communication process by polling the MB_SLAVE instruction for transmit and receive complete conditions |
| Only one instance of MB_SLAVE can be used with a given port, otherwise erratic behavior may occur. |
The MB_SLAVE instruction must execute periodically at a rate that allows it to make a timely response to incoming requests from a Modbus master |
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It is recommended that you
execute MB_SLAVE every scan from a program cycle OB. Executing MB_SLAVE from a
cyclic interrupt OB is possible, but is not recommended because of the potential for
excessive time delays in the interrupt routine to temporarily block the execution of other
interrupt routines. MB_SLAVE must be executed periodically to receive each request from the Modbus master
and then respond as required. The frequency of execution for MB_SLAVE is dependent
upon the response timeout period of the Modbus master. This is illustrated in the following
diagram. The response timeout period RESP_TO is the amount of time a Modbus master waits for the
start of a response from a Modbus slave. This time period is not defined by the Modbus
protocol, but is a parameter of each Modbus master. The frequency of execution (the time
between one execution and the next execution) of MB_SLAVE must be based on the
particular parameters of your Modbus master. At a minimum, you should execute
MB_SLAVE twice within the response timeout period of the Modbus master.
Modbus holding register addresses begin at 40001 or 400001. These addresses correspond
to the beginning PLC memory address of the holding register. However, you can configure
the "HR_Start_Offset" variable to start the beginning Modbus holding register address at
another value instead of 40001 or 400001.
For example, if the holding register is configured to start at MW100 and is 100 words long.
An offset of 20 specifies a beginning holding register address of 40021 instead of 40001.
Any address below 40021 and above 400119 will result in an addressing error. HR_Start_Offset is a word value that specifies the starting address of the Modbus holding
register and is stored in the MB_SLAVE instance data block. You can set this public static
variable value by using the parameter helper drop-list, after MB_SLAVE is placed in your
program.
For example, after MB_SLAVE is placed in a LAD network, you can go to a previous network
and assign the HR_Start_Offset value. The value must be assigned prior to execution of
MB_SLAVE. Entering a Modbus slave variable using the
default DB name:
1. Set the cursor in the parameter field and
type an m character.
2. Select "MB_SLAVE_DB" from the drop-list.
