Limitorque
®
Master Station IV EEP-SN4001 FCD LMENIM5010-00-AQ – 03/19
50
Table 7.12 – Valid Command Register Operations
Host Commands to Field Unit Register 1 Value (Decimal) Function
Null Command 0 No action
Open 256 Open actuator
Stop 512 Stop actuator
Close 768 Close actuator
Reset Field Unit 1024 Reset processor
Start Network ESD 1280 ESD initiate
Stop Network ESD 1536 ESD terminate
Engage Relay #1 2304 S1 or R1 (opt)
Engage Relay #2 2560 S2 or R2 (opt)
Engage Relay #3 2816 R3 (opt)
Engage Relay #4 3072 R4 (opt)
Engage Relay #5 3328 R5 (opt)
Engage Relay #6 3584 R6 (opt)
Engage Relay #7 3840 R7 (opt)
Disengage Relay #1 4352 S1 or R1 (opt)
Disengage Relay #2 4608 S2 or R2 (opt)
Disengage Relay #3 4864 R3 (opt)
Disengage Relay #4 5120 R4 (opt)
Disengage Relay #5 5376 R5 (opt)
Disengage Relay #6 5632 R6 (opt)
Disengage Relay #7 5888 R7 (opt)
Move-To (Enable)
1
6656 Initiates Move-To
Engage Relay #8 6912 R8 (opt)
Disengage Relay #8 7168 R8 (opt)
Note 1: This is a two-step command. A valid value must be written to Register 2 before issuing this command.
Other registers may also be preset to control or change other functions but care must always be taken to properly
change these values. An improper value written to a register can cause undesirable MOV behavior.
Note: Null command – the field unit takes no action when this command is received. This command is typically used by
a Host to reset the Host output register when required.
From the DCS, the user must address the MSIV and poll according to the data example given in the FC 06/16 configura-
tion. This command allows a Host to issue the “move-to” command using the function code 06. Register 1 will be used
to complete this command.
Rules for using this command:
1. The Field unit scaling must be configured for 0-100.
2. To use the hexadecimal method of determining a single write “move-to” command, 0x4B is always placed into
the Hi Byte of Register 1. The desired position value is always placed into the Lo Byte of Register 1.
3. to move the actuator to a position of 50%, place the value 0x4B in the high byte and the value of 0x32 (50
decimal) into the low byte.
Example: Hex format: 0x4B32
To use the decimal method of determining a single write “move-to” command, add the desired position value to 19200.
Example: Desired position = 50%.
19200 + 50 = 19250
“19200 + Value” (Position Value for units capable of commands accepting 1 write “Move-to”).
Valid values for position for this operation are 0 through 100 (decimal).
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