SATEC PM180 Operation Manual - Manual (Page 15)

‎Chapter 2 Device Description Communicating with the PM180
PM180 Substation Automation Unit 13
Service Mode
Service Mode is used for local upgrading of PM180 firmware. When the device
enters Service Mode, the CPU LED briefly flashes 2 times with a 1-second pause.
In Service Mode, all device operations are stopped.
Diagnostics Mode
The device enters Diagnostics Mode when the internal diagnostics detects a critical
error that affects the normal device operation. All device operations are stopped until
the critical error is cleared. All communications ports are still available. See
Device
Diagnostic Codes in Appendix F for the list of diagnostic events that cause a critical
error. See Device Diagnostics for more information on the PM180 built-in diagnostics.
When the device is in Diagnostics Mode, the CPU LED briefly flashes 3 times with a
1-second pause, and the RDM display shows a diagnostic message.
For more information on indication and clearing the device diagnostics, see Status
Information Display in Chapter 3, Viewing and Clearing Device Diagnostics in
Chapter 4, and Viewing and Clearing Device Diagnostics in Chapter 11.
Communicating with the PM180
Communication with the PM180 can be established independently and
simultaneously through any communications port using the support PAS program
supplied with the device or user application software. All communication ports are
slave ports and have factory-preset parameters, such as baud rate, data format, and
communications protocol that can be easily changed whenever desired.
COM1-COM3 Serial Communications (standard)
The PM180 has three standard serial communication ports COM1 through COM3 for
communicating with the master workstations, RTUs, PLCs or PAS
™@ PCs, and with
an optional remote display. All serial ports can operate in the RS-485 two-wire mode.
The COM1 is an RS-232/485 versatile port and can be directly connected to the RS-
232 port of a PC or a controller. The COM2 ports can also be used for RS-422 four-
wire communication. Local programming and upgrading the device firmware can be
established by any communication port.
All ports are optically isolated and can operate at baud rates up to 115200 bps. Each
port can be set up for any communication protocol supported by the PM180
independently from other ports. All ports are factory preset to 19200 bps, 8-bits/No-
parity data format, and programmed for the Modbus RTU protocol.
The COM3 port has different connection terminals and is intended for communication
with the Remote Display Module (RDM) or Remote Graphical Module (RGM). If the
remote display is not used, the COM3 port can be used as a common RS-485 port.
See
Configuring Serial Ports in Chapter 4 for information on how to set up serial
ports in your device. For wiring diagrams, refer to the PM180 Installation Manual.

Note
The COM3 port DB15 pins 1 and 8 deliver 12VDC for powering the remote display module.
Connecting the RS-485 wires to these terminals can cause permanent damage to your RS-485
port.
COM4 Infrared Port (optional)
The PM180 has an optical infrared (IR) port for local retrieving data via a hand-held
unit or a portable PC. The IR port can be equipped with an IEC- or ANSII-compatible
optical head.
The IR port is identified in the PM180 as the COM4 port. It is factory preset to 19200
bps, 8-bits/No-parity data format, and programmed for the MODBUS RTU protocol.
The IR port is only available on the RGM180 attached to the IED.
COM5 Port (optional)
The following plug-in modules are identified as COM5 port: