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796	796	==== **Fast command to handle MODBUS device** ====
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798	798	AT+MBFUN is valid since v1.3 firmware version. The command is for fast configure to read Modbus devices. It is only valid for the devices which follow the [[MODBUS-RTU protocol>>url:https://www.modbustools.com/modbus.html]].
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800	800	This command is valid since v1.3 firmware version
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802	802	AT+MBFUN can auto read the Modbus function code: 01, 02, 03 or 04. AT+MBFUN has lower priority vs AT+DATACUT command. If AT+DATACUT command is configured, AT+MBFUN will be ignore.
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805	805	**Example:**
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807		-* AT+MBFUN=1 and AT+DATACUT1/AT+DATACUT2 are not configure (0,0,0). So RS485-LN.
808		-* AT+COMMAND1= 01 03 00 10 00 08,1 ~-~-> read slave address 01 , function code 03, start address 00 01, quantity of registers 00 08.
809		-* AT+COMMAND2= 01 02 00 40 00 10,1 ~-~-> read slave address 01 , function code 02, start address 00 40, quantity of inputs 00 10.
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	819	+AT+MBFUN=1 and AT+DATACUT1/AT+DATACUT2 are not configure (0,0,0). So RS485-LN.
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	821	+* (((
	822	+AT+COMMAND1= 01 03 00 10 00 08,1 ~-~-> read slave address 01 , function code 03, start address 00 01, quantity of registers 00 08.
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	824	+* (((
	825	+AT+COMMAND2= 01 02 00 40 00 10,1 ~-~-> read slave address 01 , function code 02, start address 00 40, quantity of inputs 00 10.
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811	811	[[image:image-20220602165351-6.png]]
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816	816
817	817	==== **RS485 command timeout** ====
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819	819	Some Modbus device has slow action to send replies. This command is used to configure the RS485-LN to use longer time to wait for their action.
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820	820
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821	821	Default value: 0, range:  0 ~~ 65 seconds
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822	822
823		-* **AT Command:**
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	845	+**AT Command:**
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824	824
825	825	(% class="box infomessage" %)
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827	827	**AT+CMDDLaa=hex(bb cc)*1000**
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830	830	**Example:**
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832	832	**AT+CMDDL1=1000** to send the open time to 1000ms
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835		-* **Downlink Payload:**
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	868	+**Downlink Payload:**
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837	837	**0x AA aa bb cc**
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838	838
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839	839	Same as: AT+CMDDLaa=hex(bb cc)*1000
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840	840
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841	841	**Example:**
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843	843	0xAA 01 00 01  ~-~-> Same as **AT+CMDDL1=1000 ms**
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