Maple Systems MAPware-7000 - Manual (Page 21)

MAPware-7000 Programming Manual 21
1010-1040, Rev. 02
HMC7000 Basics
The Maple Systems HMC7000 Series are economical graphics-based touchscreen (with
membrane-style function keys) controllers. We use the term “HMC” (human machine
controller) to signify this operator interface can perform the functions of an HMI (human
machine interface) as well as a PLC (programmable logic controller). The HMC7000 is an ideal
option for control systems that require a visual display interface for the plant floor operator and
the functionality of a programmable logic controller for direct connection to digital/analog
inputs and outputs (using optional I/O expansion modules).
Human Machine Controllers (HMCs) provide much more versatility than traditional mechanical
control panels. An HMC7000 allows a plant floor operator to monitor current conditions of a
control system and, if necessary, to initiate a change in the operation of the system. The
HMC7000 can connect to external programmable logic controllers (PLCs) typically through the
PLC’s serial communications port. You can also connect the HMC7000 directly to digital and
analog I/O (Inputs/Outputs) for direct control without a third party PLC. The HMC7000 is
programmed to monitor and change current values stored in the data memory of the PLC or to
directly control I/O through the expansion modules.
The HMC7000 has a text-based or graphics-based display. A text-based HMC7000 displays
printable text characters but no graphics. Some text-based operator interfaces display text
characters in various sizes. A graphics-based HMC7000 displays printable text characters of
varying fonts and sizes as well as graphics such as icons, bitmaps, or pictures. Using pictures
instead of words or characters often greatly simplifies the operation of the operator interface,
making the HMC7000 more intuitive.
Some operator interfaces use touchscreen displays while others use a membrane-style keypad.
Membrane-style keypads are ideal in applications in which the keypad is likely to become dirty.
Touchscreen displays when placed over the operator interface screen provide much more
flexibility than typical membrane-style keypads. The HMC7000 Series provides maximum
versatility since it has both a touchscreen (not included on the HMC7030A models) and several
membrane-style function keys. The 7043A-M and 7070A-M do not have membrane keys.
The HMC7000 Series has a power LED to indicate when the unit is on. The HMC7000 Series is
powered by +24VDC. Serial ports are located on the bottom of the HMC for connection to PLCs.
The power input is also located there. Most models also have at least one USB port for project
upload/download. A battery compartment is accessible through the back enclosure of the unit.
The button cell battery is used to retain the time and date of the built-in RTC (real-time clock)
when the +24VDC power has been removed. Finally, the back enclosure of the HMC7000 allows
mounting of external I/O modules.
The HMC7000 Series is designed for industrial environments and carries a NEMA4/IP66 rating as
well as CE compliance for noise immunity and emissions. It is also UL listed and certified for
Class I Division 2 installations.