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ICS Regent

6003

Industrial Control Services

Real

Time Clock Communications Modules

RS232 Communications and Battery

Backed

Real

Time Clock

(T3151)

Issue 1,

March, 06

Real

time clock communications modules provide a serial

communications interface between the controller and e

xternal

equipment. The module also provides battery

backed real

time information to the controller and applications programs.

Real

time clock communications modules are recommended

for applications that perform sequence of events recording or

process historian data collection.

Features

•

Battery

backed real

time clock.

Date format: Month

day

year.

Time format: Hours:minutes:seconds:milliseconds.

One millisecond resolution.

Two serial ports per module.

Supports RS

232 standards.

Hot Replaceable.

Front panel indicators on each module show communi

cations

status and transmit/receive activity.

TÜV certified for safety, Risk Class 5.

Module Operation

Figure

shows a block diagram

of the real

time clock

communications module.

Summary of content (14 pages)

PAGE 1
ICS Regent ® PD-6003 Real-Time Clock Communications Modules RS232 Communications and Battery-Backed Real-Time Clock (T3151) Issue 1, March, 06 Real-time clock communications modules provide a serial communications interface between the controller and external equipment. The module also provides battery-backed realtime information to the controller and applications programs.
PAGE 2
Real-Time Clock Communications Modules (T3151) Each real-time clock communications module has a Z80 microprocessor, a PROM containing all of the module’s executable software, static RAM containing program variables, the realtime clock, shared RAM for transferring information between the processor modules and the communications module’s microprocessor, and a dual-channel UART with RS-232 serial port interfaces. Both the clock and the static RAM are battery-backed.
PAGE 3
Real-Time Clock Communications Modules (T3151) Figure 1. Block Diagram of Real-Time Clock Communications Module. When the processor modules read characters from the communications module, the communications module sends characters through triplicated bus drivers to the processor Safetybus. The processor modules vote this triplicated data and perform communications processing.
PAGE 4
Real-Time Clock Communications Modules (T3151) protocol, Modbus protocol, ASCII output, and Guarded PeerLink communications. The WINTERPRET application is used to configure the appropriate port functions and specify baud rate, data format, parity, and node number. Once each application program scan the processors modules read the real-time clock data from the module.
PAGE 5
Real-Time Clock Communications Modules (T3151) Failures result in a COMM module error indication at the processor modules and an RTC/COMM error at the communications module. Front Panel Figure 2 shows the physical features of the real-time clock communications modules. The front panel of each module contains indicators showing overall module health, transmit and receive status, and backup battery power.
PAGE 6
Real-Time Clock Communications Modules (T3151) Figure 2. Real-Time Clock Communications Module.
PAGE 7
Real-Time Clock Communications Modules (T3151) Application Setting the Real-Time Clock The real-time clock is set by loading the associated system variable registers with the desired time and date values and subsequently turning on the RTCSET system variable control relay. The WINTERPRET application can be used to perform this function using the Set Real-Time Clock command from the Project Editor’s Controller menu. This command opens the dialog shown in Figure 3.
PAGE 8
Real-Time Clock Communications Modules (T3151) Table 1. Real-Time Clock System Registers. Unit Read Clock Tag Name Set Clock Tag Name Year RTCYEAR SETYEAR Month RTCMNTH SETMNTH Day of Month RTCDOM SETDOM Day of Week RTCDOW SETDOW Hour RTCHOUR SETHOUR Minute RTCMIN SETMIN Second RTCSEC SETSEC Millisecond RTCMS (always set to 0) Communication Port Connections Each communications port has a DB-25, female connector on the front of the module.
PAGE 9
Real-Time Clock Communications Modules (T3151) Protocols and Communications Functions The protocol and function supported for each port is configured using the Serial Ports command from the Project Editor’s Definitions menu in WINTERPRET. An example of the Serial Ports dialog is shown in Figure 4. Figure 4. WINTERPRET’s Serial Ports Configuration Dialog. The function and protocol for each type of port that you can select is briefly described below.
PAGE 10
Real-Time Clock Communications Modules (T3151) Multidrop Supports Regent R2 protocol for multidropped Regents connected to a PC running the WINTERPRET application (or other third-party supporting products and gateways). Ports configured for multidrop communications require a node number. ASCII Used by the Regent to transmit ASCII output messages to external serial equipment such as printers and VDUs. ASCII output messages are programmed using the ASCII output element in ladder logic function blocks.
PAGE 11
Real-Time Clock Communications Modules (T3151) the module on its side so that the battery is accessible. See Figure 5. Figure 5. Replacing a Real-Time Clock Communications Module Battery.
PAGE 12
Real-Time Clock Communications Modules (T3151) Disconnect the lead button connectors from the battery's positive and negative terminals. Carefully pull the battery from it retaining clip and remove the battery from the module. Attach the battery lead button connector to the battery's positive and negative terminals. Do not use metal tools to install the battery lead button connector as they may shortcircuit the battery. You should be able to install the connector without tools.
PAGE 13
Real-Time Clock Communications Modules (T3151) Specifications Power Requirements No external power required (powered by triplicated processor modules) Number of Serial Ports Two Serial Port Type RS-232 Baud Rates 300 to 19,200 Communications Protocols Regent R2 Modbus RTU ASCII Output Guarded Peer-Link Serial Port Connector Module: Cable: DB-25, female DB-25, male Real-Time Clock Resolution: Accuracy: Date: Time: Clock Set: Battery Type 1 millisecond, read once per application program scan 20
PAGE 14
Real-Time Clock Communications Modules (T3151) Operating Temperature 0° to 60° C (32° to 140° F) Storage Temperature -40° to 85° C (-40° to 185° F) Operating Humidity 0 to 95% relative humidity, non-condensing Vibration 10 to 55 Hz: ±0.