Micronics U1000MKII-FM, User Manual

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Micronics U1000MKII User Manual
Issue 3.1 July 19 Page 39
4.4.6 Switch Baud Rate Function
SEND_UD
–
SET BAUD RATE 300
COMMAND: SEND_UD
–
SET BAUD RATE 300
DESCRIPTION: Sets the slave data rate to 300 baud. The slave responds to the
request with ACK at the current baud and then modifies its baud
setting. If the slave does not receive a message from the master at
the new rate within 2 minutes, the slave defaults to a setting of 300
baud.
DIRECTION: MASTER TO SLAVE
FRAME TYPE: CONTROL / LONG FRAME
PRIMARY ADDRESSING SECONDARY ADDRESSING
NAME CODE NAME CODE
START 0x68 START 0x68
LENGTH 0x03 LENGTH 0x0B
LENGTH 0x03 LENGTH 0x0B
START 0x68 START 0x68
(C - FIELD)
SEND_UD
0x73
(C - FIELD)
SEND_UD
0x73
(A - FIELD)
SLAVE PRIMARY ADDRESS
0xXX
(A - FIELD)
USE SECONDARY
ADDRESSING
0xFD
(CI
–
FIELD)
SET BAUD RATE 300
0xB8
(CI
–
FIELD)
SET BAUD RATE 300
0xB8
CHECKSUM 0xXX M-Bus IIN (BYTE 1) 0xXX
STOP 0x16 M-Bus IIN (BYTE 2) 0xXX
M-Bus IIN (BYTE 3) 0xXX
M-Bus IIN (BYTE 4) 0xXX
MANF. ID (BYTE 1) 0xCD
MANF. ID (BYTE 2) 0x54
VERSION NUMBER 0x01
DEVICE TYPE ID 0x04
CHECKSUM 0xXX
STOP 0x16
MASTER TO SLAVE: SEND_NKE
SLAVE TO MASTER: ACK
MASTER TO SLAVE: SEND_UD
–
SET 300 BAUD
SLAVE TO MASTER: ACK