COMMUNICATION MANUAL
GXE600 SERIES
TDKLambda
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3. Communication specification
3.1 Transmission specification
The transmission specification is shown below.
#
Item
Specification
1
Electrical specifications
1.1 Signal Ground
Isolated
Functional isolation from the device secondary output. (COM, -S, -Vo, -Vm)
1.2 Transceiver voltage
5V
1.3 Transmission standard
TIA / EIA-485
1.4 Connection type
1 (Master) : N (Slave) [N ≦ 15]
The maximum number of connectable units is not necessarily guaranteed.
It depends on the quality of the communication line.
1.5 Transmission mode
Half Duplex
1.6 Transmission data rate
1Mbps max (Transceiver alone )
1.7 Total transmission
100m or less
path length
2
Character transmission specification
2.1 Synchronization method
Asynchronous
2.2 Baud rate
2400 / 4800 / 9600 / 19200(Factory setting) [bps]
Reception : + / - 2 % error tolerance
2.3 Transmission code
The following combinations are valid
composition
Length
Parity
Start
Stop
8 bit
Even
1 bit
1 bit
* Factory setting
8 bit
Odd
1 bit
1 bit
8 bit
None
1 bit
2 bit
2.4 Transfer order
LSB first
2.5 Flow control
None
2.6 Character transfer
Less than T1.5 Char
(Receiving can accept more than T1.5 Char )
interval
3
Protocol specification
3.1 Format
MODBUS-RTU
3.2 Transmission procedure
MODBUS-RTU
3.3 Interval
T7 Char (min)
T1 Char = 11 / Transfer speed (= 573 us : At the 19200 bps)
3.4 Response time
Query processing time
(From the end of the query frame to the start of the response)
Uni-cast
: 50ms or less
Broadcast
: 100ms or less (= Turn around time )
Wake up time : 300ms or less
( Leave sleep mode and wait for reception )
* Time precision is less than ±1% (Total operating temperature range -20～70℃)
