Morehouse Instrument Company, Inc.
1742 Sixth Ave., York, PA 17403-2675 USA
Phone: (717) 843-0081
www.mhforce.com
Page 36
Rev. 3/2022
4215-HS Indicator
Manual
(PM-4101)
Limit Set Command (LiS)
The Limit Set (LiS) command is broken up into 4 separate commands. They have the following format:
L(limit number)SA(space) (normal position)(enable)(item number)(unit number)
L(limit number)SB(space) (setpoint number)#
L(limit number)SC(space) (< or >)(latching)
L(limit number)SD(space) (reset point number)#
The limit number chooses which limit (1-4) you want to setup. The normal position should be set to 0 for
normally open or 1 for normally closed. The enable should be set to 0 for disabled or 1 for enabled. If the limit
is disabled the rest of this command may be omitted (see example 3). The item and unit numbers indicate
which signal is to drive this limit. The set point number indicates the signal level at which the limit is to be
activated. The < or > sign indicates whether you want the limit to be activated when the signal is greater than
the set point (>) or less than the set point (<). The latching should be set to 0 for latching off or 1 for latching
on. If latching on is selected the rest of the command may be omitted (see example 2). Latching on will require
a manual reset once the limit has been activated. The reset point indicates the signal level at which the limit
should be de-activated.
If you want to enable a limit without otherwise changing its settings you can enter L(limit number)SA(space)
(normal position)1# instead of entering the full setup string (see example 4).
Example 1:
@123L1SA 010000
Acknowledge 1:
@123 Limit Setup Command A – Ready for Command B
Example 2:
@123L1SB 50.0#
Acknowledge 1:
@123 Limit Setup Command B – Ready for Command C
Example 3:
@123L1SC >0
Acknowledge 3:
@123 Limit Setup Command C – Ready for Command D
Example 4:
@123L1SD 10.0#
Acknowledge 4:
@123 Lim 1 NO Enabled Load A Lb Set 50.00 Trip>Set Latch Off Reset 10.00
