Thermo Scientific 42i Instruction Manual page 318

C-Link Protocol Commands
I/O Configuration
B-54 Model 42i Instruction Manual
This command reports the current state of the MODBUS registers (analog
outputs). Output is in floating point format with the pair of registers start
and start+1 appearing as the left-most bit.
Send: mb read registers 5 4
Receive: mb read registers 5 4 552629.000000 55998800.000000
set mb write coil coil state
coil = index of coil to be set, state = 1 or 0
This command sets the current state of the MODBUS coil coil (digital
input). coil has an offset of 100 (that is, the first write coil is address 101).
Send: set mb write coil 104 1
Receive: set mb write coil 104 1 ok
relay stat
This command reports the current relay logic normally "open" or normally
"closed," if all the relays are set to same state, that is all open or all closed.
The example below shows that the status when all the relays logic is set to
normally "open".
Send: relay stat
Receive: relay stat open
Note If individual relays have been assigned different logic then the
response would be a 4-digit hexadecimal string with the least significant
byte (LSB) being relay no 1.
For example:
Receive: relay stat 0x0001 (indicates relay no 1 is set to
normally open logic, all others are normally closed)
Receive: relay stat 0x0005 (indicates relay no 1 and 3 are set
to be normally open logic, all others are normally
closed)
set relay open
set relay open value
set relay closed
set relay closed value
These commands set the relay logic to normally open or closed for relay
number value, where value is the relay between 1 and 16. The example
below sets the relay no 1 logic to normally open.
Note If the command is sent without an appended relay number then all
the relays are assigned the set logic of normally open/closed.
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