RT4-5GP/4 Contact ID event codes: transmitter messages and panel codes

A reference for monitoring-centre technicians and installers: which Contact ID codes arrive from the RT4-5GP/4 transmitter — its own messages about power, inputs, link and test, and the events of Paradox, DSC and CADDX NX panels — and how the codes differ between panels.

How to read a code

• A code starts with a letter: E — alarm or disarming, R — restore or arming.
• Then come three digits of the event code and three digits of the zone or user number. The tables below use this form: E830003 — alarm on transmitter input 3.
• The partition is sent separately. The transmitter’s own messages always arrive with partition 99.
• An undescribed message in Win SC looks like this: Partitions=PP EventCode=FEEEZZZ, where PP is the partition, F the letter E or R, EEE the event code and ZZZ the zone or user.
• On a phone in “Code” mode the message arrives as FF, AAAA,EEEPPZZZ with the date, time and checksum: FF is 06 for an alarm or disarming and 07 for a restore or arming; AAAA is the account. The same alarm on input 3 reads 83099003.

The transmitter’s own messages

These codes are generated by the RT4-5GP/4 itself, whatever panel is connected to it. In “Text” mode the phone receives the text from the second column.

⚠ If an input’s event code has been changed (not 830), the zone number in the message is always 000. So do not give different inputs the same code other than 830.

Panel codes: how they differ

In the Esprit, MG/SP/E, EVO, DSC 1, DSC 2 and CADDX NX modes panel events arrive in Contact ID format. The main codes match, but not all of them. The table lists the most common events; xx and xxx are the zone or user number.

• Zone and user number: two digits for Esprit, MG/SP/E and DSC, three for Digiplex EVO and CADDX NX.
• Zone tamper: code 137 for Esprit, MG/SP/E and CADDX NX, 383 for DSC, 144 for Digiplex EVO.
• Panel battery: code 302 for Esprit, MG/SP/E and DSC, 309 for Digiplex EVO and CADDX NX.
• CADDX NX distinguishes zones by type: besides 130 it sends codes 131 (perimeter), 132 (interior), 133 (24-hour), 134 (entry) and 135 (day/night).
• For CADDX NX the xxx field of codes 301 and 321 holds the module number; for code 137 it is the module or zone number.

Account and partition in messages

• In the panel modes messages arrive with the RT4-5GP/4 account — the panel’s own account is not used.
• The transmitter’s own messages arrive with partition 99, so they are easy to tell apart from panel events.
• In Serial BUS (Standard) mode messages are not converted to Contact ID: they are passed on exactly as the connected device produced them. If the device has account 9999, the transmitter replaces it with its own; the Replace account option on the Advanced Settings tab replaces any account.
• In ABUS II mode all information is sent in Contact ID format.

What to do about service codes

• E854001 (GPRS error) — check the APN and that the operator provides the data service.
• E854002, E854004, E854005 (OnLine error) — check the server IP address and TCP port, and the router and firewall settings.
• E804000 (Check bat or power) — the battery is low and the transmitter has left OnLine mode. Below 8 V it stops sending messages and resumes at 11.5 V.
• E833020 (Port failure) — check the connection to the panel and the mode switch position. Change the mode only with the power off.

Descriptions in Win SC, on the phone and in the app

• In Win SC, load the RT4-5GP/4 cards on the TLF Events tab and add the descriptions for the connected panel — the operator then sees text instead of a code.
• In “Text” mode the phone receives the time, partition and event description, for example “Transm.: Alarm zone 1”. An English table is loaded by default; Russian and Latvian tables are available at ff.cortex.lv and are loaded with USB_Reader or TLF_Serv.
• Win SC cannot receive text messages: the monitoring centre uses “Code” mode.
• In the Defendex app Contact ID codes are decoded into readable text — the site owner does not need to know them.
• The full code tables are in the manual’s appendices: 4 — the transmitter’s own messages, 5 — Esprit, 6 — MG/SP/E, 7 — DSC (Key-BUS), 8 — Digiplex EVO, 9 — CADDX NX.

Documentation

• 📄 RT4-5GP/4 V51.xx installation manual (Russian)
• 📄 RT4-5GP/4 V51.xx installation manual (Latvian)

Learn more

• Registering a site in Win SC →
• Connecting to a Paradox panel →
• Connecting to DSC and CADDX NX panels →
• Alarms in the Defendex app →

This guide is based on the CORTEX manual. If you have questions, call technical support: +371 26485444 (24/7).