PR200 programmable relay

This happens because you are trying to import a macro with an already existing ID, though its name and content are different. Most likely, you created one macro, used the command ‘Export macro’, modified this very same macro, and then exported it with a different name. In this case, akYtec ALP assigned an inner ID for the first macro and never changed it even after you had used the Export macro command once again. To overcome this collision, you should have used the command ‘Save macro as…’ before exporting the second macro based on the first one.

There are two ways to connect a Pt100 sensor to the PR200 Programmable Relay:

1. Use the Pt100 macro (see the attachment to this post)
2. Use an analog input of the PRM-X.3 extension module.

Although the first method is completely free to implement, it does not provide enough accuracy. The accuracy of ±5% (52,5 °C) may be too poor for some applications.

If the accuracy is of the utmost importance to your project, the second method is the best solution for you. Having purchased a PRM-X.3, or if you already have one, you can configure any of its inputs for Pt100. In this case, accuracy is ±0.25% (2.6 °C). Since the extension modules of the PRM series are connected to the PR200 over an internal bus, the PR200 treats them as its own, meaning the I/Os of a PRM module are of the same performance as the I/Os of the base unit (PR200).

You need our programming software ‘akYtec ALP’. It is free of charge. You can find it either on our website or on the USB stick, which is included in the delivery.

Yes, you need a cable (USB A-plug to micro B-plug), which is also included in the package.

Since the ‘CLOCK WEEK’ does not have any inputs you cannot change the parameters of this functional block both from the front panel and through variables.

If you need a modifiable ‘CLOCK WEEK’ in your project, two macros are available in the online macro database as well as a sample program that shows how these macros should be programmed.

To download the sample program, please use this link, open and look for the sample project 'Modifiable Week Clock'.

You may refer to the following video to see the instructions on how to download the macros:

To write to or read from a functional block, it is necessary to use the blocks 'WriteToFB' or 'ReadFromFB', respectively. You can find these blocks on the toolbar ‘Insert’.

You may refer to the following video to see instructions on how to use these tools:

The main and the simplest way to do it is to use the PRM Extension Modules from akYtec. With these modules, you can extend the PR200 by up to 16 additional digital inputs and up to 16 digital outputs. Alternatively, if your system requires more I/O-points, you can use Modbus RTU/ASCII and connect up to 32 expansion modules over the RS485 interface. We recommend using our I/O-Modules of the Mx110 series for this purpose.

A module of Mx110 series can be connected to the PR200 via the RS485 interface and Modbus protocol.

This frequency depends on the device variant.

PR200-230.X.X:10 Hz

PR200-24.X.X: 250 Hz.

In either case, a square wave pulse signal with 50% duty cycle is assumed.

It depends on the switching current of the power contactor. A relay output of the PR200 has the following switching capacities:

AC: 5 A, 250 V (resistive load)

DC: 3 A, 30 V. 

No, this voltage source cannot be used for feeding an Mx110 module because it doesn’t provide enough current (max. 100 mA). However, this current is enough for both an ITP display or its analog output.

It depends on the device variant:

PR200-230.X.X: 159 V and 0.75 mA.

PR200-24.X.X: 15 V and 5 mA.

It depends on the type of the variables. They can be either INT or REAL. An INT variable stores data in only one register, while a REAL variable requires two registers for this.

Since the PR200 as Modbus Slave have only 64 registers, it means the maximum number of variables is:

64 if you declare only INT variables

32 if you declare only REAL variables.

If there are both INT and REAL variables, you should calculate their maximum permissible number according to their combination. For example, if you declare 10 REAL variables, which is equal to 20 INT variables, you can declare up to 44 INT variables (64 - 20 = 44).

The PR200 as Modbus Master can control up to 16 Slave Devices over each RS485 interface. Each Slave Device can process up to 256 variables.

Yes, this application is possible.

You need two network variables, one per interface. Then you just link them by means of the tools ‘Network variable input block’  and ‘Network variable output block’ . For step-by-step instructions, please watch this video:

First of all, this problem can be caused by a wrong position of jumpers. There are two jumpers, XP4 and XP5, on the RS485 interface card of the PR200. They can be set either to Master or to Slave:

By default upon delivery, they are set to Slave. To use the interface as Master, the jumpers must be set to the M position:

If the jumpers are set to Master and the communication problems still occur, you should check if:

- all the devices on the network have the same network parameters (protocol, baud rate, parity, stop bits and data bits)

- there is only one Master (in this case the PR200) on the network

- all wires are connected properly and there are no loose wires

- signal cables are screened or routed separately from power cables

- the secondary devices on the network are connected to the PR200 in a linear (bus) topology, meaning each device is directly connected to a common line (the bus), and all signals are transmitted from one end to the other

- there are terminating resistors at both ends of the communication bus. Experience shows that the most efficient practice is to use terminating resistors of 150 ohm.

The register address has to be written in decimal.

To read and show REAL variables, it is important to know the endianness of the registers and bytes, i.e. register and byte ordering. It can be either big-endian or little-endian format.

If you use the big-endian format, the register or the byte that contains the most significant bit is sent first, followed in a decreasing significance order. The little-endian format has a reversed order.

You can determine the register and byte order using respective checkboxes on the Device Configuration dialog box (Device > Device settings):

First, you should choose the required jumper position according to the figure below:

You can find the jumpers under the front housing:

All analog inputs are set to 4-20 mA in the delivery state.

Second, you have to set the required input type in akYtec ALP:

- From the Menu bar, select Device > Device settings or click the Device settings button 

- In the tree view on the left, find the node Inputs, click Analog and select an analog input

- On the right, select the required input type on the Input Signal drop-down list and set the required lower and upper limits

- Click Close to save and exit.

You need to update the firmware in the ‘Down.Mode’ mode.

First, remove the front housing of the PR200 and set a jumper on the XP3 connector:

The ‘Down.Mode’ mode has been activated. Open akYtec ALP and select Device > Firmaware update from the Menu bar:

Select your device from the list and press the Select button.

Maximum two modules can be connected in series to PR200.

With these modules, you can extend the PR200 by up to 16 additional digital inputs and up to 16 digital outputs. Alternatively, if your system requires more I/O-points, you can use Modbus RTU/ASCII and connect up to 32 expansion modules over the RS485 interface. We recommend using our I/O-Modules of the Mx110 series for this purpose.