Limitorque
®
Master StationI V EEP-SN4001 FCD LMENIM5010-00-AQ – 03/19
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Figure 7.23 – FC 05/15 Sample Data Table
Note: Table shown with Open and Close Contactors, S1/R1 and S2/R2 coils selected.
Function code 05 is used to force a single coil. Forcing the individual coil either ON (1) or OFF (0) will energize or
de-energize a coil (digital output). Coil 1 in the field unit closes the actuator and Coils 2 opens the actuator. If the
actuator is opening or closing, changing the status of coils 1 or 2 from a value of 1 to 0 will stop the actuator (the coil
will automatically be set to zero when the actuator reaches the full open or full close position).
For function code 15, note that the coils are operated from the lowest coil number to the highest. Forcing coil 1 or 2 OFF
(0) is considered a stop command, sending a 15 command to force two coils starting with coil 1, with coil 1 ON and coil
2 OFF would result in the unit stopping, since coil 2 is forced OFF after coil 1 is forced ON. To prevent inadvertent stop
commands from being issued, it is recommended to force one coil at a time.
Available digital outputs are listed in the table below. Force-coil commands should be issued only once for the desired
field unit control. Repeated issuance of an acknowledged command will degrade network performance.
Note: See LMENIM2329, Installation, Operation, and Maintenance Manual for MX/DDC-100 Field Unit to configure AS
and AR relays for DDC control.
Table 7.5 – DDC coil assignments, Modbus 05 command usage for Digital Outputs
Coil Number Bit Number Function
1 00 Close/Stop
2 01 Open/Stop
3 02 S1 or R1 (Opt) Latched
4 03 S2 or R2 (Opt) Latched
5 04 R3 (Opt) Latched
6 05 R4 (Opt) Latched
7 06 R5 (Opt) Latched
8 07 R6 (Opt) Latched
9 08 R7 (Opt) Latched
10 09 R8 (Opt) Latched
Note: the normal response to the (05) command is an echo of the command.
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