MarkMX

Description

MarkMX is a compact PLC station with a I/O module with I/O mix optimized for HVAC applications. The PLC can be extended by I/O modules over RS485 bus to increase the I/O mix.

Access to inputs / outputs on PLC's internal bus

Communication channel needs to by created to comunicate inputs / outputs on internal BUS of PLC. Channel protocol is Modbus and Link protocol is serial. Inputs / outputs on internal bus can be found as module MXIO on COM3 with address 2.

Inputs

InputST TypeDescription
AI01...AI16realAnalogue inputs.
Settings of transforms for different ranges:
Pt1000 - (analog type R1600, transform: lib.core.v1_0.resistancetotemperature kind: pt1000 pre_k=0,1 pre_q=0, post_k=1, post_q=0 ), the result is in °C, default setting for AI01...AI08
resistance 0-1600 ohm - (transform: lib.core.v1_0.linear k=0,1 q=0 - the inputs provide values 0...16000 = 0...1600 Ω)
resistance 0-5000 ohm - (transform: lib.core.v1_0.linear k=0,1 q=0 - the inputs provide values 0...50000 = 0...5000 Ω) NOTE: the type must be changed to ST:UINT!
Voltage and current is applicable only for inputs AI09...AI16.
current 0-20 mA - (transform: lib.core.v1_0.linear k=0,001 q=0 - the inputs provide values in uA: 0...20 000 = 0...20 mA) The DIP switch must be active at the respective input.
voltage 0-10 V - (transform: lib.core.v1_0.linear k=0,001 q=0 - the inputs provide values in mV: 0...10 000 mV) default setting for AI09...AI16
DI01...DI32boolDigital inputs

Outputs

OutputST TypeDescription
AO1...AO8realAnalogue outputs in %.
0%...0V
100%...10V
DO01...DO32boolDigital outputs

Technical data

Power10 V ÷ 35 V DC, 14 V ÷ 24 V AC (terminals 1,2)
Consumptionmax. 20 VA
ProcessorMPC5200, 400 MHz, 760 MIPS
HW Memory128MB RAM, 64 MB Flash, 128 kB NVRAM FRAM
SW Memory4 MB program, 8 MB RAM, 128 kB NVRAM, 60 kB retain,
256 kB dynamic (OEM) parameters, 1 MB history
Ethernet10/100BaseT, RJ45
COM1, COM2 - RS232300 ... 115 200 bit/s, parity and bits adjustable
COM3, COM4 - RS485 (K+, K-)300 ... 115 200 bit/s, parity and bits adjustable
Max. RS485 bus length
1200m
Analogue inputs
8x Pt 1000, Pt100, Ni1000, resistance 20..1600 Ohm, 20...5000 Ohm
8x 0-10 V DC, Pt 1000, Pt100, Ni1000, resistance 20..1600 Ohm, 20...5000 Ohm, 0(4)...20 mA – configurable via DIP switches and in software
Analogue outputs
8x 0-10 V DC
Analogue outputs load
min. 10 kOhm, max. current 10 mA,
outputs are short-circuit resistant with current limitation to 20 mA
Digital inputs
32x 24V AC/DC – voltage must be applied (no dry contacts)
Input voltage for log. „0“
Input voltage for log. „1“
max. 5 V AC/DC
18 ... 30 V DC, 18... 26V AC @ 7mA
Digital outputs
32x relay, normally open: 5A/250 V AC, 5A/30 V DC, 750 VA, 90 W

Terminals/LED

AI1 to AI8Analogue inputs for resistance measurement only. The range (20...1600 Ohm or 20...5000 Ohm) is configurable over Domat IDE or ModComTool. 
AI9 to AI16Analogue inputs with switchable range - resistance (like AI1 to AI8), - voltage 0...10V, or current 0...20 mA. Analogue input ranges AI9 to AI16 are switched by jumpers for every input separately.
  • resistance, passive temprature sensors - jumper: OFF (default)
  • voltage 0...10 V - jumper: OFF (default)
  • current 0...20 mA - jumper: ON
All analogue inputs AI1 to AI16 have a single common ground, AGND. Inputs are galvanically separated from the rest of the module.
AO1 to AO8Analogue outputs must be loaded by min. 10 kOhm, maximum output current is 10 mA,
outputs are short-circuit resistant with current limitation to 20 mA
DI1 to DI32Digital inputs use external voltage of 24 V AC/DC. Eight inputs on a connector have a common ground.
NO1 to NO32Digital outputs provide 250 V, 5 A, NO relays. A pair of relays has a common terminal COM X, Y.
COM1, COM2Interfaces with CANNON 9 connectors, COM1 and COM2 can be used for a GSM modem to send SMS, for M-Bus coverters, 3rd party integration, etc.
COM3, COM4Serial ports RS485 for I/O modules, room units, room controllers, 3rd party integration etc. Remember that the internal I/Os are connected to COM3, and the COM3 port must be configured as Modbus RTU in order to employ the internal I/Os.
TETechnical Earth, shall be connected to the ground potential (PES, shielding)
Ethernetnetwork
PWROn: markPLC power is OK.
Off: Power not applied, or power source or fuse broken
CONTROLOn: PLC board booted OK.
Off: PLC board booting or board error
RUN I/OFlashes: I/O module OK
Off: I/O module error
COMx RxDFlashes: Data receive on COMx
Off: No data received
COMx TxDFlashes: Data transmit on COMx
Off: No data transmitted
Digital inputs (1..32) – input status (On: active, Off: inactive)
Digital outputs (1..32) – output status (On: active, Off: inactive)

Runtime status indication

LED RUN indicates the runtime status using a sequence of short flashes. The error code persists the power off / on cycle, it is reset only after a project has been uploaded.

Normal state: LED flashes periodically 1 s ON, 1 s OFF – no errors

Error state: LED flashes in a pattern of

  • M short flashes (300 ms ON / 300 ms OFF), where M is the upper code error order
  • 1 s OFF
  • N short flashes (300 ms ON / 300 ms OFF), where N is the lower code error order
  • 2.5 s OFF

Meaning of the error codes:

  • 11 memory low for OS
  • 12 memory low for runtime
  • 13 stack overflow *
  • 21 corrupted / bad RT image
  • 31 HardFault *
  • 4X watchdog of client X expired
  • 51 system file system error
  • 52 web file system error
  • 6X - file system full

* at these errors the PLC stops and the LED starts to flash after power off and on.

Additional info can be found in datasheets at http://domat-int.com/en/downloads/data-sheets.